CVE-2026-20128 (GCVE-0-2026-20128)
Vulnerability from cvelistv5
Published
2026-02-25 16:14
Modified
2026-04-21 03:55
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-257 - Storing Passwords in a Recoverable Format
Summary
A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system.
This vulnerability is due to the presence of a credential file for the DCA user on an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request and reading the file that contains the DCA password from that affected system. A successful exploit could allow the attacker to access another affected system and gain DCA user privileges.
Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Manager |
Version: 20.1.12 Version: 19.2.1 Version: 18.4.4 Version: 18.4.5 Version: 20.1.1.1 Version: 20.1.1 Version: 19.3.0 Version: 19.2.2 Version: 19.2.099 Version: 18.3.6 Version: 18.3.7 Version: 19.2.0 Version: 18.3.8 Version: 19.0.0 Version: 19.1.0 Version: 18.4.302 Version: 18.4.303 Version: 19.2.097 Version: 19.2.098 Version: 17.2.10 Version: 18.3.6.1 Version: 19.0.1a Version: 18.2.0 Version: 18.4.3 Version: 18.4.1 Version: 17.2.8 Version: 18.3.3.1 Version: 18.4.0 Version: 18.3.1 Version: 17.2.6 Version: 17.2.9 Version: 18.3.4 Version: 17.2.5 Version: 18.3.1.1 Version: 18.3.5 Version: 18.4.0.1 Version: 18.3.3 Version: 17.2.7 Version: 18.3.0 Version: 19.2.3 Version: 18.4.501_ES Version: 20.3.1 Version: 20.1.2 Version: 19.2.929 Version: 19.2.31 Version: 20.3.2 Version: 19.2.32 Version: 20.3.2.1 Version: 20.3.2.1_927 Version: 18.4.6 Version: 20.3.2_928 Version: 20.3.2_929 Version: 20.4.1.0.1 Version: 20.3.2.1_930 Version: 19.2.4 Version: 20.5.0.1.1 Version: 20.4.1.1 Version: 20.3.3 Version: 19.2.4.0.1 Version: 20.3.2_937 Version: 20.5.1 Version: 20.1.3 Version: 20.3.3.0.4 Version: 20.3.3.1.2 Version: 20.3.3.1.1 Version: 20.4.1.2 Version: 20.3.3.0.2 Version: 20.4.1.1.5 Version: 20.4.1.0.02 Version: 20.3.3.1.7 Version: 20.3.3.1.5 Version: 20.5.1.0.1 Version: 20.3.3.1.10 Version: 20.3.3.0.8 Version: 20.4.2 Version: 20.3.4 Version: 20.3.3.0.14 Version: 19.2.4.0.8 Version: 19.2.4.0.9 Version: 20.3.4.0.1 Version: 20.3.2.0.5 Version: 20.5.1.0.2 Version: 20.6.1.1 Version: 20.6.0.18.3 Version: 20.3.2.0.6 Version: 20.6.0.18.4 Version: 20.4.2.0.2 Version: 20.3.3.0.16 Version: 20.6.1.0.1 Version: 20.3.4.0.6 Version: 20.7.1EFT2 Version: 20.3.4.0.9 Version: 20.3.4.0.11 Version: 20.3.3.0.18 Version: 20.6.2.1 Version: 20.3.4.1 Version: 20.4.2.1 Version: 20.4.2.1.1 Version: 20.3.4.1.1 Version: 20.3.813 Version: 20.3.4.0.19 Version: 20.4.2.2.1 Version: 20.5.1.2 Version: 20.3.814 Version: 20.4.2.2 Version: 20.6.2.2 Version: 20.3.4.2.1 Version: 20.3.4.1.2 Version: 20.3.4.0.20 Version: 20.6.2.2.3 Version: 20.4.2.2.2 Version: 20.6.2.0.4 Version: 20.3.4.0.24 Version: 20.6.2.2.7 Version: 20.3.4.2.2 Version: 20.4.2.2.4 Version: 20.3.5.0.8 Version: 20.3.5.0.9 Version: 20.3.5.0.7 Version: 20.6.3.0.2 Version: 20.9.1EFT2 Version: 20.3.6 Version: 20.3.7 Version: 20.4.2.3 Version: 20.3.5.1 Version: 20.3.4.3 Version: 20.3.3.2 Version: 20.3.7.1 Version: 20.3.4.0.25 Version: 20.6.2.2.4 Version: 20.6.1.2 Version: 20.1.3.1 Version: 20.6.5.1.4 Version: 20.3.8 Version: 20.12.501 Version: 26.1.1 |
CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog
Date added: 2026-04-20
Due date: 2026-04-23
Required action: Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
Used in ransomware: Unknown
Notes: CISA Mitigation Instructions: https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems ; https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems ; https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v ; https://nvd.nist.gov/vuln/detail/CVE-2026-20128
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"value": "A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system.\r\n\r\nThis vulnerability is due to the presence of a credential file for the DCA user on an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request and reading the file that contains the DCA password from that affected system. A successful exploit could allow the attacker to access another affected system and gain DCA user privileges.\r\nNote: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability."
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"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in CVE-2026-20133, CVE-2026-20126, and CVE-2026-20129.\r\n\r\nIn March 2026, the Cisco PSIRT became aware of active exploitation of the vulnerabilities that are described in CVE-2026-20128 and CVE-2026-20122 only. The vulnerabilities that are described in the other CVEs in this advisory are not known to have been compromised. Cisco strongly recommends that customers upgrade to a fixed software release to remediate these vulnerabilities."
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"notes": "CISA Mitigation Instructions: https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems ; https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems ; https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v ; https://nvd.nist.gov/vuln/detail/CVE-2026-20128",
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"vulnrichment": {
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\"cna\": {\"title\": \"Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability\", \"source\": {\"defects\": [\"CSCws33585\"], \"advisory\": \"cisco-sa-sdwan-authbp-qwCX8D4v\", \"discovery\": \"INTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"HIGH\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco Catalyst SD-WAN Manager\", \"versions\": [{\"status\": \"affected\", \"version\": \"20.1.12\"}, {\"status\": \"affected\", \"version\": \"19.2.1\"}, {\"status\": \"affected\", \"version\": \"18.4.4\"}, {\"status\": \"affected\", \"version\": \"18.4.5\"}, {\"status\": \"affected\", \"version\": \"20.1.1.1\"}, {\"status\": \"affected\", \"version\": \"20.1.1\"}, {\"status\": \"affected\", \"version\": \"19.3.0\"}, {\"status\": \"affected\", \"version\": \"19.2.2\"}, {\"status\": \"affected\", \"version\": \"19.2.099\"}, {\"status\": \"affected\", \"version\": \"18.3.6\"}, {\"status\": \"affected\", \"version\": \"18.3.7\"}, {\"status\": \"affected\", \"version\": \"19.2.0\"}, {\"status\": \"affected\", \"version\": \"18.3.8\"}, {\"status\": \"affected\", \"version\": \"19.0.0\"}, {\"status\": \"affected\", \"version\": \"19.1.0\"}, {\"status\": \"affected\", \"version\": \"18.4.302\"}, {\"status\": \"affected\", \"version\": \"18.4.303\"}, {\"status\": \"affected\", \"version\": \"19.2.097\"}, {\"status\": \"affected\", \"version\": \"19.2.098\"}, {\"status\": \"affected\", \"version\": \"17.2.10\"}, {\"status\": \"affected\", \"version\": \"18.3.6.1\"}, {\"status\": \"affected\", \"version\": \"19.0.1a\"}, {\"status\": \"affected\", \"version\": \"18.2.0\"}, {\"status\": \"affected\", \"version\": \"18.4.3\"}, {\"status\": \"affected\", \"version\": \"18.4.1\"}, {\"status\": \"affected\", \"version\": \"17.2.8\"}, {\"status\": \"affected\", \"version\": \"18.3.3.1\"}, {\"status\": \"affected\", \"version\": \"18.4.0\"}, {\"status\": \"affected\", \"version\": \"18.3.1\"}, {\"status\": \"affected\", \"version\": \"17.2.6\"}, {\"status\": \"affected\", \"version\": \"17.2.9\"}, {\"status\": \"affected\", \"version\": \"18.3.4\"}, {\"status\": \"affected\", \"version\": \"17.2.5\"}, {\"status\": \"affected\", \"version\": \"18.3.1.1\"}, {\"status\": \"affected\", \"version\": \"18.3.5\"}, {\"status\": \"affected\", \"version\": \"18.4.0.1\"}, {\"status\": \"affected\", \"version\": \"18.3.3\"}, {\"status\": \"affected\", \"version\": \"17.2.7\"}, {\"status\": \"affected\", \"version\": \"18.3.0\"}, {\"status\": \"affected\", \"version\": \"19.2.3\"}, {\"status\": \"affected\", \"version\": \"18.4.501_ES\"}, {\"status\": \"affected\", \"version\": \"20.3.1\"}, {\"status\": \"affected\", \"version\": \"20.1.2\"}, {\"status\": \"affected\", \"version\": \"19.2.929\"}, {\"status\": \"affected\", \"version\": \"19.2.31\"}, {\"status\": \"affected\", \"version\": \"20.3.2\"}, {\"status\": \"affected\", \"version\": \"19.2.32\"}, {\"status\": \"affected\", \"version\": \"20.3.2.1\"}, {\"status\": \"affected\", \"version\": \"20.3.2.1_927\"}, {\"status\": \"affected\", \"version\": \"18.4.6\"}, {\"status\": \"affected\", \"version\": \"20.3.2_928\"}, {\"status\": \"affected\", \"version\": \"20.3.2_929\"}, {\"status\": \"affected\", \"version\": \"20.4.1.0.1\"}, {\"status\": \"affected\", \"version\": \"20.3.2.1_930\"}, {\"status\": \"affected\", \"version\": \"19.2.4\"}, {\"status\": \"affected\", \"version\": \"20.5.0.1.1\"}, {\"status\": \"affected\", \"version\": \"20.4.1.1\"}, {\"status\": \"affected\", \"version\": \"20.3.3\"}, {\"status\": \"affected\", \"version\": \"19.2.4.0.1\"}, {\"status\": \"affected\", \"version\": \"20.3.2_937\"}, {\"status\": \"affected\", \"version\": \"20.5.1\"}, {\"status\": \"affected\", \"version\": \"20.1.3\"}, {\"status\": \"affected\", \"version\": \"20.3.3.0.4\"}, {\"status\": \"affected\", \"version\": \"20.3.3.1.2\"}, {\"status\": \"affected\", \"version\": \"20.3.3.1.1\"}, {\"status\": \"affected\", \"version\": \"20.4.1.2\"}, {\"status\": \"affected\", \"version\": \"20.3.3.0.2\"}, {\"status\": \"affected\", \"version\": \"20.4.1.1.5\"}, {\"status\": \"affected\", \"version\": \"20.4.1.0.02\"}, {\"status\": \"affected\", \"version\": \"20.3.3.1.7\"}, {\"status\": \"affected\", \"version\": \"20.3.3.1.5\"}, {\"status\": \"affected\", \"version\": \"20.5.1.0.1\"}, {\"status\": \"affected\", \"version\": \"20.3.3.1.10\"}, {\"status\": \"affected\", \"version\": \"20.3.3.0.8\"}, {\"status\": \"affected\", \"version\": \"20.4.2\"}, {\"status\": \"affected\", \"version\": \"20.3.4\"}, {\"status\": \"affected\", \"version\": \"20.3.3.0.14\"}, {\"status\": \"affected\", \"version\": \"19.2.4.0.8\"}, {\"status\": \"affected\", \"version\": \"19.2.4.0.9\"}, {\"status\": \"affected\", \"version\": \"20.3.4.0.1\"}, {\"status\": \"affected\", \"version\": \"20.3.2.0.5\"}, {\"status\": \"affected\", \"version\": \"20.5.1.0.2\"}, {\"status\": \"affected\", \"version\": \"20.6.1.1\"}, {\"status\": \"affected\", \"version\": \"20.6.0.18.3\"}, {\"status\": \"affected\", \"version\": \"20.3.2.0.6\"}, {\"status\": \"affected\", \"version\": \"20.6.0.18.4\"}, {\"status\": \"affected\", \"version\": \"20.4.2.0.2\"}, {\"status\": \"affected\", \"version\": \"20.3.3.0.16\"}, {\"status\": \"affected\", \"version\": \"20.6.1.0.1\"}, {\"status\": \"affected\", \"version\": \"20.3.4.0.6\"}, {\"status\": \"affected\", \"version\": \"20.7.1EFT2\"}, {\"status\": \"affected\", \"version\": \"20.3.4.0.9\"}, {\"status\": \"affected\", \"version\": \"20.3.4.0.11\"}, {\"status\": \"affected\", \"version\": \"20.3.3.0.18\"}, {\"status\": \"affected\", \"version\": \"20.6.2.1\"}, {\"status\": \"affected\", \"version\": \"20.3.4.1\"}, {\"status\": \"affected\", \"version\": \"20.4.2.1\"}, {\"status\": \"affected\", \"version\": \"20.4.2.1.1\"}, {\"status\": \"affected\", \"version\": \"20.3.4.1.1\"}, {\"status\": \"affected\", \"version\": \"20.3.813\"}, {\"status\": \"affected\", \"version\": \"20.3.4.0.19\"}, {\"status\": \"affected\", \"version\": \"20.4.2.2.1\"}, {\"status\": \"affected\", \"version\": \"20.5.1.2\"}, {\"status\": \"affected\", \"version\": \"20.3.814\"}, {\"status\": \"affected\", \"version\": \"20.4.2.2\"}, {\"status\": \"affected\", \"version\": \"20.6.2.2\"}, {\"status\": \"affected\", \"version\": \"20.3.4.2.1\"}, {\"status\": \"affected\", \"version\": \"20.3.4.1.2\"}, {\"status\": \"affected\", \"version\": \"20.3.4.0.20\"}, {\"status\": \"affected\", \"version\": \"20.6.2.2.3\"}, {\"status\": \"affected\", \"version\": \"20.4.2.2.2\"}, {\"status\": \"affected\", \"version\": \"20.6.2.0.4\"}, {\"status\": \"affected\", \"version\": \"20.3.4.0.24\"}, {\"status\": \"affected\", \"version\": \"20.6.2.2.7\"}, {\"status\": \"affected\", \"version\": \"20.3.4.2.2\"}, {\"status\": \"affected\", \"version\": \"20.4.2.2.4\"}, {\"status\": \"affected\", \"version\": \"20.3.5.0.8\"}, {\"status\": \"affected\", \"version\": \"20.3.5.0.9\"}, {\"status\": \"affected\", \"version\": \"20.3.5.0.7\"}, {\"status\": \"affected\", \"version\": \"20.6.3.0.2\"}, {\"status\": \"affected\", \"version\": \"20.9.1EFT2\"}, {\"status\": \"affected\", \"version\": \"20.3.6\"}, {\"status\": \"affected\", \"version\": \"20.3.7\"}, {\"status\": \"affected\", \"version\": \"20.4.2.3\"}, {\"status\": \"affected\", \"version\": \"20.3.5.1\"}, {\"status\": \"affected\", \"version\": \"20.3.4.3\"}, {\"status\": \"affected\", \"version\": \"20.3.3.2\"}, {\"status\": \"affected\", \"version\": \"20.3.7.1\"}, {\"status\": \"affected\", \"version\": \"20.3.4.0.25\"}, {\"status\": \"affected\", \"version\": \"20.6.2.2.4\"}, {\"status\": \"affected\", \"version\": \"20.6.1.2\"}, {\"status\": \"affected\", \"version\": \"20.1.3.1\"}, {\"status\": \"affected\", \"version\": \"20.6.5.1.4\"}, {\"status\": \"affected\", \"version\": \"20.3.8\"}, {\"status\": \"affected\", \"version\": \"20.12.501\"}, {\"status\": \"affected\", \"version\": \"26.1.1\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in CVE-2026-20133, CVE-2026-20126, and CVE-2026-20129.\\r\\n\\r\\nIn March 2026, the Cisco PSIRT became aware of active exploitation of the vulnerabilities that are described in CVE-2026-20128 and CVE-2026-20122 only. The vulnerabilities that are described in the other CVEs in this advisory are not known to have been compromised. Cisco strongly recommends that customers upgrade to a fixed software release to remediate these vulnerabilities.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v\", \"name\": \"cisco-sa-sdwan-authbp-qwCX8D4v\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system.\\r\\n\\r\\nThis vulnerability is due to the presence of a credential file for the DCA user on an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request and reading the file that contains the DCA password from that affected system. A successful exploit could allow the attacker to access another affected system and gain DCA user privileges.\\r\\nNote: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-257\", \"description\": \"Storing Passwords in a Recoverable Format\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-03-20T21:47:33.415Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-20128\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-04-21T03:55:31.648Z\", \"dateReserved\": \"2025-10-08T11:59:15.379Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-02-25T16:14:12.353Z\", \"assignerShortName\": \"cisco\"}",
"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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