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13 vulnerabilities found for Cisco Open Source Snort3 by Cisco
CVE-2026-76524 (GCVE-0-2026-76524)
Vulnerability from cvelistv5
Published
2026-10-21 16:18
Modified
2026-10-22 13:37
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-306 - Missing Authentication for Critical Function
Summary
A vulnerability in the control channel socket implementation of Open Source Snort 3 could allow an authenticated, local attacker with low privileges to execute arbitrary commands as the Snort 3 process user.
This vulnerability is due to a lack of authentication when a local user connects to the Snort control channel socket. An attacker could exploit this vulnerability by connecting to the Snort 3 control channel socket as a local user. A successful exploit could allow the attacker to execute arbitrary commands as well as read and write Snort 3 process memory.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco Open Source Snort3 |
Version: 3.12.2.0 Version: 3.1.2.0 Version: 3.1.3.0 Version: 3.1.4.0 Version: 3.1.5.0 Version: 3.1.6.0 Version: 3.1.7.0 Version: 3.1.8.0 Version: 3.1.9.0 Version: 3.1.10.0 Version: 3.1.12.0 Version: 3.1.13.0 Version: 3.1.14.0 Version: 3.1.15.0 Version: 3.1.16.0 Version: 3.1.17.0 Version: 3.1.18.0 Version: 3.1.19.0 Version: 3.1.20.0 Version: 3.1.21.0 Version: 3.1.22.0 Version: 3.1.23.0 Version: 3.1.24.0 Version: 3.1.25.0 Version: 3.1.27.0 Version: 3.1.28.0 Version: 3.1.29.0 Version: 3.1.30.0 Version: 3.1.31.0 Version: 3.1.32.0 Version: 3.1.36.0 Version: 3.1.38.0 Version: 3.1.39.0 Version: 3.1.40.0 Version: 3.1.41.0 Version: 3.1.42.0 Version: 3.1.43.0 Version: 3.1.45.0 Version: 3.1.47.0 Version: 3.1.48.0 Version: 3.1.50.0 Version: 3.1.51.0 Version: 3.1.52.0 Version: 3.1.53.0 Version: 3.1.55.0 Version: 3.1.56.0 Version: 3.1.57.0 Version: 3.1.58.0 Version: 3.1.59.0 Version: 3.1.60.0 Version: 3.1.61.0 Version: 3.1.62.0 Version: 3.1.63.0 Version: 3.1.64.0 Version: 3.1.65.0 Version: 3.1.66.0 Version: 3.1.67.0 Version: 3.1.69.0 Version: 3.1.70.0 Version: 3.1.71.0 Version: 3.1.72.0 Version: 3.1.73.0 Version: 3.1.74.0 Version: 3.1.75.0 Version: 3.1.76.0 Version: 3.1.77.0 Version: 3.1.78.0 Version: 3.1.81.0 Version: 3.1.82.0 Version: 3.1.83.0 Version: 3.1.84.0 Version: 3.2.1.0 Version: 3.2.2.0 Version: 3.3.0.0 Version: 3.3.1.0 Version: 3.3.2.0 Version: 3.3.3.0 Version: 3.3.4.0 Version: 3.3.5.0 Version: 3.3.7.0 Version: 3.5.0.0 Version: 3.5.1.0 Version: 3.8.1.0 Version: 3.6.0.0 Version: 3.6.2.0 Version: 3.9.3.0 Version: 3.7.2.0 Version: 3.7.0.0 Version: 3.9.6.0 Version: 3.10.0.0 Version: 3.10.2.0 Version: 3.7.4.0 Version: 3.9.0.0 Version: 3.5.2.0 Version: 3.12.1.0 Version: 3.6.1.0 Version: 3.9.2.0 Version: 3.6.3.0 Version: 3.9.5.0 Version: 3.7.1.0 Version: 3.9.7.0 Version: 3.7.3.0 Version: 3.10.1.0 Version: 3.9.1.0 Version: 3.11.1.0 |
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CVE-2026-76489 (GCVE-0-2026-76489)
Vulnerability from cvelistv5
Published
2026-10-21 16:17
Modified
2026-10-22 19:11
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-401 - Missing Release of Memory after Effective Lifetime
Summary
Multiple Cisco products are affected by a vulnerability in the memory management implementation of Snort 3 that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.
This vulnerability is due to incomplete error checking when Snort 3 processes files, which could cause unreleased memory. An attacker could exploit this vulnerability by sending a large number of files to be processed. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Open Source Snort3 |
Version: 3.12.2.0 Version: 3.1.2.0 Version: 3.1.3.0 Version: 3.1.4.0 Version: 3.1.5.0 Version: 3.1.6.0 Version: 3.1.7.0 Version: 3.1.8.0 Version: 3.1.9.0 Version: 3.1.10.0 Version: 3.1.12.0 Version: 3.1.13.0 Version: 3.1.14.0 Version: 3.1.15.0 Version: 3.1.16.0 Version: 3.1.17.0 Version: 3.1.18.0 Version: 3.1.19.0 Version: 3.1.20.0 Version: 3.1.21.0 Version: 3.1.22.0 Version: 3.1.23.0 Version: 3.1.24.0 Version: 3.1.25.0 Version: 3.1.27.0 Version: 3.1.28.0 Version: 3.1.29.0 Version: 3.1.30.0 Version: 3.1.31.0 Version: 3.1.32.0 Version: 3.1.36.0 Version: 3.1.38.0 Version: 3.1.39.0 Version: 3.1.40.0 Version: 3.1.41.0 Version: 3.1.42.0 Version: 3.1.43.0 Version: 3.1.45.0 Version: 3.1.47.0 Version: 3.1.48.0 Version: 3.1.50.0 Version: 3.1.51.0 Version: 3.1.52.0 Version: 3.1.53.0 Version: 3.1.55.0 Version: 3.1.56.0 Version: 3.1.57.0 Version: 3.1.58.0 Version: 3.1.59.0 Version: 3.1.60.0 Version: 3.1.61.0 Version: 3.1.62.0 Version: 3.1.63.0 Version: 3.1.64.0 Version: 3.1.65.0 Version: 3.1.66.0 Version: 3.1.67.0 Version: 3.1.69.0 Version: 3.1.70.0 Version: 3.1.71.0 Version: 3.1.72.0 Version: 3.1.73.0 Version: 3.1.74.0 Version: 3.1.75.0 Version: 3.1.76.0 Version: 3.1.77.0 Version: 3.1.78.0 Version: 3.1.81.0 Version: 3.1.82.0 Version: 3.1.83.0 Version: 3.1.84.0 Version: 3.2.1.0 Version: 3.2.2.0 Version: 3.3.0.0 Version: 3.3.1.0 Version: 3.3.2.0 Version: 3.3.3.0 Version: 3.3.4.0 Version: 3.3.5.0 Version: 3.3.7.0 Version: 3.5.0.0 Version: 3.5.1.0 Version: 3.8.1.0 Version: 3.6.0.0 Version: 3.6.2.0 Version: 3.9.3.0 Version: 3.7.2.0 Version: 3.7.0.0 Version: 3.9.6.0 Version: 3.10.0.0 Version: 3.10.2.0 Version: 3.7.4.0 Version: 3.9.0.0 Version: 3.5.2.0 Version: 3.12.1.0 Version: 3.6.1.0 Version: 3.9.2.0 Version: 3.6.3.0 Version: 3.9.5.0 Version: 3.7.1.0 Version: 3.9.7.0 Version: 3.7.3.0 Version: 3.10.1.0 Version: 3.9.1.0 Version: 3.11.1.0 |
|||||||
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CVE-2026-76445 (GCVE-0-2026-76445)
Vulnerability from cvelistv5
Published
2026-10-21 16:14
Modified
2026-10-22 19:11
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Summary
Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the detection engine to unexpectedly restart, resulting in a denial of service (DoS) condition.
The vulnerability is due to a flaw in logic handling when General Packet Radio Service (GPRS) Tunneling Protocol (GTP) extension headers are processed within the codec. An attacker could exploit this vulnerability by sending a crafted, fragmented UDP datagram that contains these headers to the Snort 3 Detection Engine of an affected device. A successful exploit could allow the attacker to cause the detection engine to enter an infinite loop, resulting in a DoS condition.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Open Source Snort3 |
Version: 3.12.2.0 Version: 3.1.2.0 Version: 3.1.3.0 Version: 3.1.4.0 Version: 3.1.5.0 Version: 3.1.6.0 Version: 3.1.7.0 Version: 3.1.8.0 Version: 3.1.9.0 Version: 3.1.10.0 Version: 3.1.12.0 Version: 3.1.13.0 Version: 3.1.14.0 Version: 3.1.15.0 Version: 3.1.16.0 Version: 3.1.17.0 Version: 3.1.18.0 Version: 3.1.19.0 Version: 3.1.20.0 Version: 3.1.21.0 Version: 3.1.22.0 Version: 3.1.23.0 Version: 3.1.24.0 Version: 3.1.25.0 Version: 3.1.27.0 Version: 3.1.28.0 Version: 3.1.29.0 Version: 3.1.30.0 Version: 3.1.31.0 Version: 3.1.32.0 Version: 3.1.36.0 Version: 3.1.38.0 Version: 3.1.39.0 Version: 3.1.40.0 Version: 3.1.41.0 Version: 3.1.42.0 Version: 3.1.43.0 Version: 3.1.45.0 Version: 3.1.47.0 Version: 3.1.48.0 Version: 3.1.50.0 Version: 3.1.51.0 Version: 3.1.52.0 Version: 3.1.53.0 Version: 3.1.55.0 Version: 3.1.56.0 Version: 3.1.57.0 Version: 3.1.58.0 Version: 3.1.59.0 Version: 3.1.60.0 Version: 3.1.61.0 Version: 3.1.62.0 Version: 3.1.63.0 Version: 3.1.64.0 Version: 3.1.65.0 Version: 3.1.66.0 Version: 3.1.67.0 Version: 3.1.69.0 Version: 3.1.70.0 Version: 3.1.71.0 Version: 3.1.72.0 Version: 3.1.73.0 Version: 3.1.74.0 Version: 3.1.75.0 Version: 3.1.76.0 Version: 3.1.77.0 Version: 3.1.78.0 Version: 3.1.81.0 Version: 3.1.82.0 Version: 3.1.83.0 Version: 3.1.84.0 Version: 3.2.1.0 Version: 3.2.2.0 Version: 3.3.0.0 Version: 3.3.1.0 Version: 3.3.2.0 Version: 3.3.3.0 Version: 3.3.4.0 Version: 3.3.5.0 Version: 3.3.7.0 Version: 3.5.0.0 Version: 3.5.1.0 Version: 3.8.1.0 Version: 3.6.0.0 Version: 3.6.2.0 Version: 3.9.3.0 Version: 3.7.2.0 Version: 3.7.0.0 Version: 3.9.6.0 Version: 3.10.0.0 Version: 3.10.2.0 Version: 3.7.4.0 Version: 3.9.0.0 Version: 3.5.2.0 Version: 3.12.1.0 Version: 3.6.1.0 Version: 3.9.2.0 Version: 3.6.3.0 Version: 3.9.5.0 Version: 3.7.1.0 Version: 3.9.7.0 Version: 3.7.3.0 Version: 3.10.1.0 Version: 3.9.1.0 Version: 3.11.1.0 |
||||||||||||
|
||||||||||||||
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CVE-2026-20356 (GCVE-0-2026-20356)
Vulnerability from cvelistv5
Published
2026-10-21 16:13
Modified
2026-10-22 19:10
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-400 - Uncontrolled Resource Consumption
Summary
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco owned Open Source Snort 3 Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20356 are related to issues concerning uncontrolled resource consumption that are grouped under the Common Weakness Enumeration (CWE) Base CWE-400.
References
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Cyber Vision |
Version: 3.0.0 Version: 3.0.2 Version: 3.0.3 Version: 3.0.1 Version: 3.1.0 Version: 3.0.4 Version: 3.1.1 Version: 3.1.2 Version: 3.2.0 Version: 3.0.5 Version: 3.2.1 Version: 3.0.6 Version: 3.2.2 Version: 3.2.3 Version: 3.2.4 Version: 4.0.0 Version: 4.0.1 Version: 4.0.2 Version: 4.0.3 Version: 4.1.0 Version: 4.1.1 Version: 4.1.2 Version: 4.1.3 Version: 4.1.4 Version: 4.2.0 Version: 4.2.1 Version: 4.1.5 Version: 4.2.2 Version: 4.2.X Version: 4.2.3 Version: 4.2.4 Version: 4.2.6 Version: 4.1.6 Version: 4.3.0 Version: 4.3.1 Version: 4.3.2 Version: 4.3.3 Version: 4.4.0 Version: 4.4.1 Version: 4.4.2 Version: 4.4.3 Version: 4.1.7 Version: 5.0.0 Version: 5.0.1 Version: 5.0.2 Version: 5.1.0 Version: 5.1.1 Version: 5.1.2 Version: 5.1.3 Version: 5.2.0 Version: 5.2.1 Version: 5.3.0 Version: 5.3.1 Version: 5.3.2 Version: 5.3.3 Version: 5.5.1 Version: 5.6.1 Version: 5.4.0 Version: 5.4.1 Version: 5.4.2 Version: 5.7.0 Version: 5.8.1 Version: 5.7.1 Version: 5.8.0 Version: 5.5.2 |
|||||||||||||||||
|
|||||||||||||||||||
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CVE-2026-20236 (GCVE-0-2026-20236)
Vulnerability from cvelistv5
Published
2026-10-21 16:12
Modified
2026-10-22 19:10
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-682 - Incorrect Calculation
Summary
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco owned Open Source Snort 3 Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20236 are related to issues concerning incorrect calculation that are grouped under the Common Weakness Enumeration (CWE) Base CWE-682.
References
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Cyber Vision |
Version: 3.0.0 Version: 3.0.2 Version: 3.0.3 Version: 3.0.1 Version: 3.1.0 Version: 3.0.4 Version: 3.1.1 Version: 3.1.2 Version: 3.2.0 Version: 3.0.5 Version: 3.2.1 Version: 3.0.6 Version: 3.2.2 Version: 3.2.3 Version: 3.2.4 Version: 4.0.0 Version: 4.0.1 Version: 4.0.2 Version: 4.0.3 Version: 4.1.0 Version: 4.1.1 Version: 4.1.2 Version: 4.1.3 Version: 4.1.4 Version: 4.2.0 Version: 4.2.1 Version: 4.1.5 Version: 4.2.2 Version: 4.2.X Version: 4.2.3 Version: 4.2.4 Version: 4.2.6 Version: 4.1.6 Version: 4.3.0 Version: 4.3.1 Version: 4.3.2 Version: 4.3.3 Version: 4.4.0 Version: 4.4.1 Version: 4.4.2 Version: 4.4.3 Version: 4.1.7 Version: 5.0.0 Version: 5.0.1 Version: 5.0.2 Version: 5.1.0 Version: 5.1.1 Version: 5.1.2 Version: 5.1.3 Version: 5.2.0 Version: 5.2.1 Version: 5.3.0 Version: 5.3.1 Version: 5.3.2 Version: 5.3.3 Version: 5.5.1 Version: 5.6.1 Version: 5.4.0 Version: 5.4.1 Version: 5.4.2 Version: 5.7.0 Version: 5.8.1 Version: 5.7.1 Version: 5.8.0 Version: 5.5.2 |
|||||||||||||||||
|
|||||||||||||||||||
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CVE-2026-20221 (GCVE-0-2026-20221)
Vulnerability from cvelistv5
Published
2026-10-21 16:12
Modified
2026-10-22 19:11
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-476 - NULL Pointer Dereference
Summary
Multiple Cisco products are affected by a vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause an unexpected restart of the Snort 3 Detection Engine.
This vulnerability is due to improper handling of nested GRE traffic. An attacker could exploit this vulnerability by sending a crafted GRE payload through an affected device. A successful exploit could allow the attacker to trigger an unexpected reload of the Snort 3 Detection Engine, resulting in either a bypass or denial of service (DoS) condition, depending on device configuration. For more information, see the section of this advisory. The Snort 3 Detection Engine will restart automatically. No manual intervention is required.
References
Impacted products
| Vendor | Product | Version | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Cyber Vision |
Version: 3.0.0 Version: 3.0.2 Version: 3.0.3 Version: 3.0.1 Version: 3.1.0 Version: 3.0.4 Version: 3.1.1 Version: 3.1.2 Version: 3.2.0 Version: 3.0.5 Version: 3.2.1 Version: 3.0.6 Version: 3.2.2 Version: 3.2.3 Version: 3.2.4 Version: 4.0.0 Version: 4.0.1 Version: 4.0.2 Version: 4.0.3 Version: 4.1.0 Version: 4.1.1 Version: 4.1.2 Version: 4.1.3 Version: 4.1.4 Version: 4.2.0 Version: 4.2.1 Version: 4.1.5 Version: 4.2.2 Version: 4.2.X Version: 4.2.3 Version: 4.2.4 Version: 4.2.6 Version: 4.1.6 Version: 4.3.0 Version: 4.3.1 Version: 4.3.2 Version: 4.3.3 Version: 4.4.0 Version: 4.4.1 Version: 4.4.2 Version: 4.4.3 Version: 4.1.7 Version: 5.0.0 Version: 5.0.1 Version: 5.0.2 Version: 5.1.0 Version: 5.1.1 Version: 5.1.2 Version: 5.1.3 Version: 5.2.0 Version: 5.2.1 Version: 5.3.0 Version: 5.3.1 Version: 5.3.2 Version: 5.3.3 Version: 5.5.1 Version: 5.6.1 Version: 5.6.0 Version: 5.4.0 Version: 5.4.1 Version: 5.4.2 |
||||||||||||||||||||||
|
||||||||||||||||||||||||
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CVE-2026-20291 (GCVE-0-2026-20291)
Vulnerability from cvelistv5
Published
2026-10-21 16:12
Modified
2026-10-22 23:04
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-269 - Improper Privilege Management
Summary
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco owned Open Source Snort 3 Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20291 are related to issues concerning improper privilege management that are grouped under the Common Weakness Enumeration (CWE) Base CWE-269.
References
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Cyber Vision |
Version: 3.0.0 Version: 3.0.2 Version: 3.0.3 Version: 3.0.1 Version: 3.1.0 Version: 3.0.4 Version: 3.1.1 Version: 3.1.2 Version: 3.2.0 Version: 3.0.5 Version: 3.2.1 Version: 3.0.6 Version: 3.2.2 Version: 3.2.3 Version: 3.2.4 Version: 4.0.0 Version: 4.0.1 Version: 4.0.2 Version: 4.0.3 Version: 4.1.0 Version: 4.1.1 Version: 4.1.2 Version: 4.1.3 Version: 4.1.4 Version: 4.2.0 Version: 4.2.1 Version: 4.1.5 Version: 4.2.2 Version: 4.2.X Version: 4.2.3 Version: 4.2.4 Version: 4.2.6 Version: 4.1.6 Version: 4.3.0 Version: 4.3.1 Version: 4.3.2 Version: 4.3.3 Version: 4.4.0 Version: 4.4.1 Version: 4.4.2 Version: 4.4.3 Version: 4.1.7 Version: 5.0.0 Version: 5.0.1 Version: 5.0.2 Version: 5.1.0 Version: 5.1.1 Version: 5.1.2 Version: 5.1.3 Version: 5.2.0 Version: 5.2.1 Version: 5.3.0 Version: 5.3.1 Version: 5.3.2 Version: 5.3.3 Version: 5.5.1 Version: 5.6.1 Version: 5.4.0 Version: 5.4.1 Version: 5.4.2 Version: 5.7.0 Version: 5.8.1 Version: 5.7.1 Version: 5.8.0 Version: 5.5.2 |
|||||||||||||||||
|
|||||||||||||||||||
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CVE-2026-20197 (GCVE-0-2026-20197)
Vulnerability from cvelistv5
Published
2026-10-21 16:12
Modified
2026-10-22 19:11
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Summary
Multiple Cisco products are affected by a vulnerability in the Snort 3 Teredo Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.
This vulnerability is due to incomplete error checking when Snort 3 parses Teredo packets. An attacker could exploit this vulnerability by sending a crafted Teredo packet to a targeted device to be parsed by Snort. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Open Source Snort3 |
Version: 3.12.2.0 Version: 3.1.2.0 Version: 3.1.3.0 Version: 3.1.4.0 Version: 3.1.5.0 Version: 3.1.6.0 Version: 3.1.7.0 Version: 3.1.8.0 Version: 3.1.9.0 Version: 3.1.10.0 Version: 3.1.12.0 Version: 3.1.13.0 Version: 3.1.14.0 Version: 3.1.15.0 Version: 3.1.16.0 Version: 3.1.17.0 Version: 3.1.18.0 Version: 3.1.19.0 Version: 3.1.20.0 Version: 3.1.21.0 Version: 3.1.22.0 Version: 3.1.23.0 Version: 3.1.24.0 Version: 3.1.25.0 Version: 3.1.27.0 Version: 3.1.28.0 Version: 3.1.29.0 Version: 3.1.30.0 Version: 3.1.31.0 Version: 3.1.32.0 Version: 3.1.36.0 Version: 3.1.38.0 Version: 3.1.39.0 Version: 3.1.40.0 Version: 3.1.41.0 Version: 3.1.42.0 Version: 3.1.43.0 Version: 3.1.45.0 Version: 3.1.47.0 Version: 3.1.48.0 Version: 3.1.50.0 Version: 3.1.51.0 Version: 3.1.52.0 Version: 3.1.53.0 Version: 3.1.55.0 Version: 3.1.56.0 Version: 3.1.57.0 Version: 3.1.58.0 Version: 3.1.59.0 Version: 3.1.60.0 Version: 3.1.61.0 Version: 3.1.62.0 Version: 3.1.63.0 Version: 3.1.64.0 Version: 3.1.65.0 Version: 3.1.66.0 Version: 3.1.67.0 Version: 3.1.69.0 Version: 3.1.70.0 Version: 3.1.71.0 Version: 3.1.72.0 Version: 3.1.73.0 Version: 3.1.74.0 Version: 3.1.75.0 Version: 3.1.76.0 Version: 3.1.77.0 Version: 3.1.78.0 Version: 3.1.81.0 Version: 3.1.82.0 Version: 3.1.83.0 Version: 3.1.84.0 Version: 3.2.1.0 Version: 3.2.2.0 Version: 3.3.0.0 Version: 3.3.1.0 Version: 3.3.2.0 Version: 3.3.3.0 Version: 3.3.4.0 Version: 3.3.5.0 Version: 3.3.7.0 Version: 3.5.0.0 Version: 3.5.1.0 Version: 3.8.1.0 Version: 3.6.0.0 Version: 3.6.2.0 Version: 3.9.3.0 Version: 3.7.2.0 Version: 3.7.0.0 Version: 3.9.6.0 Version: 3.10.0.0 Version: 3.10.2.0 Version: 3.7.4.0 Version: 3.9.0.0 Version: 3.5.2.0 Version: 3.12.1.0 Version: 3.6.1.0 Version: 3.9.2.0 Version: 3.6.3.0 Version: 3.9.5.0 Version: 3.7.1.0 Version: 3.9.7.0 Version: 3.7.3.0 Version: 3.10.1.0 Version: 3.9.1.0 Version: 3.11.1.0 |
||||||||||||
|
||||||||||||||
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CVE-2026-20218 (GCVE-0-2026-20218)
Vulnerability from cvelistv5
Published
2026-10-21 16:12
Modified
2026-10-22 19:11
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-121 - Stack-based Buffer Overflow
Summary
A vulnerability in the Snort 3 Visual Basic for Applications (VBA) Decompression Engine of multiple Cisco products could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition.
This vulnerability is due to improper range checking when Snort 3 decompresses VBA data, which is user controlled. An attacker could exploit this vulnerability by sending crafted VBA data to the Snort 3 Detection Engine of a targeted device. A successful exploit could allow the attacker to cause an overflow of stack data, which could result in a DoS condition.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Open Source Snort3 |
Version: 3.12.2.0 Version: 3.1.2.0 Version: 3.1.3.0 Version: 3.1.4.0 Version: 3.1.5.0 Version: 3.1.6.0 Version: 3.1.7.0 Version: 3.1.8.0 Version: 3.1.9.0 Version: 3.1.10.0 Version: 3.1.12.0 Version: 3.1.13.0 Version: 3.1.14.0 Version: 3.1.15.0 Version: 3.1.16.0 Version: 3.1.17.0 Version: 3.1.18.0 Version: 3.1.19.0 Version: 3.1.20.0 Version: 3.1.21.0 Version: 3.1.22.0 Version: 3.1.23.0 Version: 3.1.24.0 Version: 3.1.25.0 Version: 3.1.27.0 Version: 3.1.28.0 Version: 3.1.29.0 Version: 3.1.30.0 Version: 3.1.31.0 Version: 3.1.32.0 Version: 3.1.36.0 Version: 3.1.38.0 Version: 3.1.39.0 Version: 3.1.40.0 Version: 3.1.41.0 Version: 3.1.42.0 Version: 3.1.43.0 Version: 3.1.45.0 Version: 3.1.47.0 Version: 3.1.48.0 Version: 3.1.50.0 Version: 3.1.51.0 Version: 3.1.52.0 Version: 3.1.53.0 Version: 3.1.55.0 Version: 3.1.56.0 Version: 3.1.57.0 Version: 3.1.58.0 Version: 3.1.59.0 Version: 3.1.60.0 Version: 3.1.61.0 Version: 3.1.62.0 Version: 3.1.63.0 Version: 3.1.64.0 Version: 3.1.65.0 Version: 3.1.66.0 Version: 3.1.67.0 Version: 3.1.69.0 Version: 3.1.70.0 Version: 3.1.71.0 Version: 3.1.72.0 Version: 3.1.73.0 Version: 3.1.74.0 Version: 3.1.75.0 Version: 3.1.76.0 Version: 3.1.77.0 Version: 3.1.78.0 Version: 3.1.81.0 Version: 3.1.82.0 Version: 3.1.83.0 Version: 3.1.84.0 Version: 3.2.1.0 Version: 3.2.2.0 Version: 3.3.0.0 Version: 3.3.1.0 Version: 3.3.2.0 Version: 3.3.3.0 Version: 3.3.4.0 Version: 3.3.5.0 Version: 3.3.7.0 Version: 3.5.0.0 Version: 3.5.1.0 Version: 3.8.1.0 Version: 3.6.0.0 Version: 3.6.2.0 Version: 3.9.3.0 Version: 3.7.2.0 Version: 3.7.0.0 Version: 3.9.6.0 Version: 3.10.0.0 Version: 3.10.2.0 Version: 3.7.4.0 Version: 3.9.0.0 Version: 3.5.2.0 Version: 3.12.1.0 Version: 3.6.1.0 Version: 3.9.2.0 Version: 3.6.3.0 Version: 3.9.5.0 Version: 3.7.1.0 Version: 3.9.7.0 Version: 3.7.3.0 Version: 3.10.1.0 Version: 3.9.1.0 Version: 3.11.1.0 |
||||||||||||
|
||||||||||||||
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CVE-2026-20179 (GCVE-0-2026-20179)
Vulnerability from cvelistv5
Published
2026-10-21 16:12
Modified
2026-10-22 19:11
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-128 - Wrap-around Error
Summary
Multiple Cisco products are affected by a vulnerability in the Snort 3 Generic Routing Encapsulation (GRE) Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.
This vulnerability is due to incomplete error checking when Snort 3 parses GRE packets. An attacker could exploit this vulnerability by sending a crafted GRE packet to a targeted device to be parsed by Snort. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Open Source Snort3 |
Version: 3.12.2.0 Version: 3.1.2.0 Version: 3.1.3.0 Version: 3.1.4.0 Version: 3.1.5.0 Version: 3.1.6.0 Version: 3.1.7.0 Version: 3.1.8.0 Version: 3.1.9.0 Version: 3.1.10.0 Version: 3.1.12.0 Version: 3.1.13.0 Version: 3.1.14.0 Version: 3.1.15.0 Version: 3.1.16.0 Version: 3.1.17.0 Version: 3.1.18.0 Version: 3.1.19.0 Version: 3.1.20.0 Version: 3.1.21.0 Version: 3.1.22.0 Version: 3.1.23.0 Version: 3.1.24.0 Version: 3.1.25.0 Version: 3.1.27.0 Version: 3.1.28.0 Version: 3.1.29.0 Version: 3.1.30.0 Version: 3.1.31.0 Version: 3.1.32.0 Version: 3.1.36.0 Version: 3.1.38.0 Version: 3.1.39.0 Version: 3.1.40.0 Version: 3.1.41.0 Version: 3.1.42.0 Version: 3.1.43.0 Version: 3.1.45.0 Version: 3.1.47.0 Version: 3.1.48.0 Version: 3.1.50.0 Version: 3.1.51.0 Version: 3.1.52.0 Version: 3.1.53.0 Version: 3.1.55.0 Version: 3.1.56.0 Version: 3.1.57.0 Version: 3.1.58.0 Version: 3.1.59.0 Version: 3.1.60.0 Version: 3.1.61.0 Version: 3.1.62.0 Version: 3.1.63.0 Version: 3.1.64.0 Version: 3.1.65.0 Version: 3.1.66.0 Version: 3.1.67.0 Version: 3.1.69.0 Version: 3.1.70.0 Version: 3.1.71.0 Version: 3.1.72.0 Version: 3.1.73.0 Version: 3.1.74.0 Version: 3.1.75.0 Version: 3.1.76.0 Version: 3.1.77.0 Version: 3.1.78.0 Version: 3.1.81.0 Version: 3.1.82.0 Version: 3.1.83.0 Version: 3.1.84.0 Version: 3.2.1.0 Version: 3.2.2.0 Version: 3.3.0.0 Version: 3.3.1.0 Version: 3.3.2.0 Version: 3.3.3.0 Version: 3.3.4.0 Version: 3.3.5.0 Version: 3.3.7.0 Version: 3.5.0.0 Version: 3.5.1.0 Version: 3.8.1.0 Version: 3.6.0.0 Version: 3.6.2.0 Version: 3.9.3.0 Version: 3.7.2.0 Version: 3.7.0.0 Version: 3.9.6.0 Version: 3.10.0.0 Version: 3.10.2.0 Version: 3.7.4.0 Version: 3.9.0.0 Version: 3.5.2.0 Version: 3.12.1.0 Version: 3.6.1.0 Version: 3.9.2.0 Version: 3.6.3.0 Version: 3.9.5.0 Version: 3.7.1.0 Version: 3.9.7.0 Version: 3.7.3.0 Version: 3.10.1.0 Version: 3.9.1.0 Version: 3.11.1.0 |
||||||||||||
|
||||||||||||||
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CVE-2026-20043 (GCVE-0-2026-20043)
Vulnerability from cvelistv5
Published
2026-10-21 16:12
Modified
2026-10-22 23:04
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-787 - Out-of-bounds Write
Summary
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco owned Open Source Snort 3 Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20043 are related to issues concerning out-of-bounds writes that are grouped under the Common Weakness Enumeration (CWE) Base CWE-787.
References
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Cyber Vision |
Version: 3.0.0 Version: 3.0.2 Version: 3.0.3 Version: 3.0.1 Version: 3.1.0 Version: 3.0.4 Version: 3.1.1 Version: 3.1.2 Version: 3.2.0 Version: 3.0.5 Version: 3.2.1 Version: 3.0.6 Version: 3.2.2 Version: 3.2.3 Version: 3.2.4 Version: 4.0.0 Version: 4.0.1 Version: 4.0.2 Version: 4.0.3 Version: 4.1.0 Version: 4.1.1 Version: 4.1.2 Version: 4.1.3 Version: 4.1.4 Version: 4.2.0 Version: 4.2.1 Version: 4.1.5 Version: 4.2.2 Version: 4.2.X Version: 4.2.3 Version: 4.2.4 Version: 4.2.6 Version: 4.1.6 Version: 4.3.0 Version: 4.3.1 Version: 4.3.2 Version: 4.3.3 Version: 4.4.0 Version: 4.4.1 Version: 4.4.2 Version: 4.4.3 Version: 4.1.7 Version: 5.0.0 Version: 5.0.1 Version: 5.0.2 Version: 5.1.0 Version: 5.1.1 Version: 5.1.2 Version: 5.1.3 Version: 5.2.0 Version: 5.2.1 Version: 5.3.0 Version: 5.3.1 Version: 5.3.2 Version: 5.3.3 Version: 5.5.1 Version: 5.6.1 Version: 5.4.0 Version: 5.4.1 Version: 5.4.2 Version: 5.7.0 Version: 5.8.1 Version: 5.7.1 Version: 5.8.0 Version: 5.5.2 |
|||||||||||||||||
|
|||||||||||||||||||
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CVE-2026-20019 (GCVE-0-2026-20019)
Vulnerability from cvelistv5
Published
2026-10-21 16:12
Modified
2026-10-22 19:10
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Summary
Multiple Cisco products are affected by a vulnerability in the Snort 3 NetFlow Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.
This vulnerability is due to incomplete error checking when Snort 3 parses UDP Netflow Protocol packets. An attacker could exploit this vulnerability by sending a single crafted Netflow packet through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Open Source Snort3 |
Version: 3.12.2.0 Version: 3.1.2.0 Version: 3.1.3.0 Version: 3.1.4.0 Version: 3.1.5.0 Version: 3.1.6.0 Version: 3.1.7.0 Version: 3.1.8.0 Version: 3.1.9.0 Version: 3.1.10.0 Version: 3.1.12.0 Version: 3.1.13.0 Version: 3.1.14.0 Version: 3.1.15.0 Version: 3.1.16.0 Version: 3.1.17.0 Version: 3.1.18.0 Version: 3.1.19.0 Version: 3.1.20.0 Version: 3.1.21.0 Version: 3.1.22.0 Version: 3.1.23.0 Version: 3.1.24.0 Version: 3.1.25.0 Version: 3.1.27.0 Version: 3.1.28.0 Version: 3.1.29.0 Version: 3.1.30.0 Version: 3.1.31.0 Version: 3.1.32.0 Version: 3.1.36.0 Version: 3.1.38.0 Version: 3.1.39.0 Version: 3.1.40.0 Version: 3.1.41.0 Version: 3.1.42.0 Version: 3.1.43.0 Version: 3.1.45.0 Version: 3.1.47.0 Version: 3.1.48.0 Version: 3.1.50.0 Version: 3.1.51.0 Version: 3.1.52.0 Version: 3.1.53.0 Version: 3.1.55.0 Version: 3.1.56.0 Version: 3.1.57.0 Version: 3.1.58.0 Version: 3.1.59.0 Version: 3.1.60.0 Version: 3.1.61.0 Version: 3.1.62.0 Version: 3.1.63.0 Version: 3.1.64.0 Version: 3.1.65.0 Version: 3.1.66.0 Version: 3.1.67.0 Version: 3.1.69.0 Version: 3.1.70.0 Version: 3.1.71.0 Version: 3.1.72.0 Version: 3.1.73.0 Version: 3.1.74.0 Version: 3.1.75.0 Version: 3.1.76.0 Version: 3.1.77.0 Version: 3.1.78.0 Version: 3.1.81.0 Version: 3.1.82.0 Version: 3.1.83.0 Version: 3.1.84.0 Version: 3.2.1.0 Version: 3.2.2.0 Version: 3.3.0.0 Version: 3.3.1.0 Version: 3.3.2.0 Version: 3.3.3.0 Version: 3.3.4.0 Version: 3.3.5.0 Version: 3.3.7.0 Version: 3.5.0.0 Version: 3.5.1.0 Version: 3.8.1.0 Version: 3.6.0.0 Version: 3.6.2.0 Version: 3.9.3.0 Version: 3.7.2.0 Version: 3.7.0.0 Version: 3.9.6.0 Version: 3.10.0.0 Version: 3.10.2.0 Version: 3.7.4.0 Version: 3.9.0.0 Version: 3.5.2.0 Version: 3.12.1.0 Version: 3.6.1.0 Version: 3.9.2.0 Version: 3.6.3.0 Version: 3.9.5.0 Version: 3.7.1.0 Version: 3.9.7.0 Version: 3.7.3.0 Version: 3.10.1.0 Version: 3.9.1.0 Version: 3.11.1.0 |
||||||||||||
|
||||||||||||||
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CVE-2026-20011 (GCVE-0-2026-20011)
Vulnerability from cvelistv5
Published
2026-10-21 16:12
Modified
2026-10-22 19:11
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-805 - Buffer Access with Incorrect Length Value
Summary
Multiple Cisco products are affected by a vulnerability in the Snort 3 SMTP MIME Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart.
This vulnerability is due to a lack of error checking when the MIME fields of the SMTP header are parsed. An attacker could exploit this vulnerability by sending crafted SMTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Open Source Snort3 |
Version: 3.1.2.0 Version: 3.1.3.0 Version: 3.1.4.0 Version: 3.1.5.0 Version: 3.1.6.0 Version: 3.1.7.0 Version: 3.1.8.0 Version: 3.1.9.0 Version: 3.1.10.0 Version: 3.1.12.0 Version: 3.1.13.0 Version: 3.1.14.0 Version: 3.1.15.0 Version: 3.1.16.0 Version: 3.1.17.0 Version: 3.1.18.0 Version: 3.1.19.0 Version: 3.1.20.0 Version: 3.1.21.0 Version: 3.1.22.0 Version: 3.1.23.0 Version: 3.1.24.0 Version: 3.1.25.0 Version: 3.1.27.0 Version: 3.1.28.0 Version: 3.1.29.0 Version: 3.1.30.0 Version: 3.1.31.0 Version: 3.1.32.0 Version: 3.1.36.0 Version: 3.1.38.0 Version: 3.1.39.0 Version: 3.1.40.0 Version: 3.1.41.0 Version: 3.1.42.0 Version: 3.1.43.0 Version: 3.1.45.0 Version: 3.1.47.0 Version: 3.1.48.0 Version: 3.1.50.0 Version: 3.1.51.0 Version: 3.1.52.0 Version: 3.1.53.0 Version: 3.1.55.0 Version: 3.1.56.0 Version: 3.1.57.0 Version: 3.1.58.0 Version: 3.1.59.0 Version: 3.1.60.0 Version: 3.1.61.0 Version: 3.1.62.0 Version: 3.1.63.0 Version: 3.1.64.0 Version: 3.1.65.0 Version: 3.1.66.0 Version: 3.1.67.0 Version: 3.1.69.0 Version: 3.1.70.0 Version: 3.1.71.0 Version: 3.1.72.0 Version: 3.1.73.0 Version: 3.1.74.0 Version: 3.1.75.0 Version: 3.1.76.0 Version: 3.1.77.0 Version: 3.1.78.0 Version: 3.1.81.0 Version: 3.1.82.0 Version: 3.1.83.0 Version: 3.1.84.0 Version: 3.2.1.0 Version: 3.2.2.0 Version: 3.3.0.0 Version: 3.3.1.0 Version: 3.3.2.0 Version: 3.3.3.0 Version: 3.3.4.0 Version: 3.3.5.0 Version: 3.3.7.0 Version: 3.5.0.0 Version: 3.5.1.0 Version: 3.8.1.0 Version: 3.6.0.0 Version: 3.6.2.0 Version: 3.9.3.0 Version: 3.7.2.0 Version: 3.7.0.0 Version: 3.9.6.0 Version: 3.10.0.0 Version: 3.7.4.0 Version: 3.9.0.0 Version: 3.5.2.0 Version: 3.6.1.0 Version: 3.9.2.0 Version: 3.6.3.0 Version: 3.9.5.0 Version: 3.7.1.0 Version: 3.9.7.0 Version: 3.7.3.0 Version: 3.9.1.0 |
||||||||||||
|
||||||||||||||
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"value": "Multiple Cisco products are affected by a vulnerability in the Snort 3 SMTP MIME Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart.\r\n\r\nThis vulnerability is due to a lack of error checking when the MIME fields of the SMTP header are parsed. An attacker could exploit this vulnerability by sending crafted SMTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts."
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"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
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"attackVector": "NETWORK",
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"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L",
"version": "3.1"
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"description": "Buffer Access with Incorrect Length Value",
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{
"name": "cisco-sa-snort3-mime-vulns-bkXjcKkt",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-mime-vulns-bkXjcKkt"
}
],
"source": {
"advisory": "cisco-sa-snort3-mime-vulns-bkXjcKkt",
"defects": [
"CSCws62055"
],
"discovery": "INTERNAL"
},
"title": "Multiple Cisco Products Snort 3 SMTP MIME Denial of Service Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20011",
"datePublished": "2026-10-21T16:12:19.429Z",
"dateReserved": "2025-10-08T11:59:15.350Z",
"dateUpdated": "2026-10-22T19:11:17.797Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}