CVE-2026-76418 (GCVE-0-2026-76418)
Vulnerability from cvelistv5
Published
2026-10-28 20:05
Modified
2026-10-28 20:05
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-690 - Unchecked Return Value to NULL Pointer Dereference
Summary
A vulnerability in the Remote Access SSL VPN service of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to logic errors when secondary authentication is configured on a tunnel group. An attacker could exploit this vulnerability by sending a crafted request when connecting to the SSL remote access VPN. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software |
Version: 9.16.1 Version: 9.16.1.28 Version: 9.16.2 Version: 9.16.2.3 Version: 9.16.2.7 Version: 9.16.2.11 Version: 9.16.2.13 Version: 9.16.2.14 Version: 9.16.3.3 Version: 9.16.3 Version: 9.16.3.14 Version: 9.18.1 Version: 9.16.3.15 Version: 9.18.1.3 Version: 9.18.2 Version: 9.16.3.19 Version: 9.16.3.23 Version: 9.18.2.5 Version: 9.16.4 Version: 9.18.2.7 Version: 9.19.1 Version: 9.16.4.9 Version: 9.18.2.8 Version: 9.16.4.14 Version: 9.18.3 Version: 9.19.1.5 Version: 9.16.4.18 Version: 9.19.1.9 Version: 9.18.3.39 Version: 9.16.4.19 Version: 9.19.1.12 Version: 9.18.3.46 Version: 9.16.4.27 Version: 9.19.1.18 Version: 9.18.3.53 Version: 9.18.3.55 Version: 9.16.4.38 Version: 9.16.4.39 Version: 9.18.3.56 Version: 9.20.1 Version: 9.16.4.42 Version: 9.19.1.22 Version: 9.18.4 Version: 9.20.1.5 Version: 9.18.4.5 Version: 9.19.1.24 Version: 9.16.4.48 Version: 9.18.4.8 Version: 9.20.2 Version: 9.19.1.27 Version: 9.16.4.55 Version: 9.18.4.22 Version: 9.20.2.10 Version: 9.16.4.57 Version: 9.19.1.28 Version: 9.18.4.24 Version: 9.20.2.21 Version: 9.16.4.61 Version: 9.19.1.31 Version: 9.18.4.29 Version: 9.20.2.22 Version: 9.16.4.62 Version: 9.18.4.34 Version: 9.20.3 Version: 9.16.4.67 Version: 9.16.4.70 Version: 9.18.4.40 Version: 9.23.1 Version: 9.22.1.1 Version: 9.16.4.71 Version: 9.20.3.4 Version: 9.18.4.47 Version: 9.20.3.7 Version: 9.19.1.37 Version: 9.16.4.76 Version: 9.20.3.9 Version: 9.19.1.38 Version: 9.18.4.50 Version: 9.22.1.3 Version: 9.20.3.10 Version: 9.22.1.2 Version: 9.18.4.52 Version: 9.20.3.13 Version: 9.22.1.6 Version: 9.18.4.53 Version: 9.16.4.82 Version: 9.22.2 Version: 9.20.3.16 Version: 9.19.1.42 Version: 9.18.4.57 Version: 9.16.4.84 Version: 9.23.1.3 Version: 9.20.3.20 Version: 9.22.2.4 Version: 9.23.1.7 Version: 9.20.4 Version: 9.22.2.9 Version: 9.23.1.13 Version: 9.20.4.7 Version: 9.22.2.13 Version: 9.18.4.66 Version: 9.20.4.10 Version: 9.23.1.19 Version: 9.16.4.85 Version: 9.22.2.14 Version: 9.18.4.67 Version: 9.24.1 Version: 9.18.4.68 Version: 9.23.1.22 Version: 9.20.4.14 Version: 9.22.2.20 Version: 9.18.4.71 Version: 9.20.4.19 Version: 9.23.1.26 Version: 9.16.4.89 Version: 9.22.2.32 Version: 9.18.4.76 Version: 9.22.3 Version: 9.24.1.5 Version: 9.20.4.22 Version: 9.24.1.9 Version: 9.20.4.28 Version: 9.22.3.5 Version: 9.16.4.92 Version: 9.18.4.135 Version: 9.23.1.195 Version: 9.20.4.30 Version: 9.24.1.155 Version: 9.23.1.32 Version: 9.24.1.11 Version: 9.20.4.34 Version: 9.18.4.82 Version: 9.24.10 Version: 9.18.4.90 Version: 9.20.4.46 Version: 9.20.4.235 Version: 9.20.4.49 Version: 9.22.3.26 Version: 9.16.4.103 Version: 9.18.4.94 Version: 9.23.1.47 Version: 9.24.1.26 |
|||||||
|
|||||||||
{
"containers": {
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{
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{
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{
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{
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{
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{
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{
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{
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},
{
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{
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]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Remote Access SSL VPN service of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to logic errors when secondary authentication is configured on a tunnel group. An attacker could exploit this vulnerability by sending a crafted request when connecting to the SSL remote access VPN. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition."
}
],
"exploits": [
{
"lang": "en",
"value": "In October 2026, the Cisco PSIRT became aware of active exploitation of this vulnerability. Cisco strongly recommends that customers upgrade to a fixed software release to remediate this vulnerability."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.6,
"baseSeverity": "HIGH",
"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:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-690",
"description": "Unchecked Return Value to NULL Pointer Dereference",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-28T20:05:31.926Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-asaftd-tunnel-dos-s6mgkb75",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-tunnel-dos-s6mgkb75"
}
],
"source": {
"advisory": "cisco-sa-asaftd-tunnel-dos-s6mgkb75",
"defects": [
"CSCwx26625"
],
"discovery": "EXTERNAL"
},
"title": "Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Tunnel Denial of Service Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-76418",
"datePublished": "2026-10-28T20:05:31.926Z",
"dateReserved": "2026-08-19T12:02:03.633Z",
"dateUpdated": "2026-10-28T20:05:31.926Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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