CVE-2026-20128 (GCVE-0-2026-20128)
Vulnerability from cvelistv5 – Published: 2026-02-25 16:14 – Updated: 2026-04-21 03:55
VLAI
EPSS
VEX
Title
Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability
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.
Severity
7.5 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-25 00:00 UTC
CWE
- CWE-257 - Storing Passwords in a Recoverable Format
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/c… | |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Catalyst SD-WAN Manager |
Affected:
20.1.12
Affected: 19.2.1 Affected: 18.4.4 Affected: 18.4.5 Affected: 20.1.1.1 Affected: 20.1.1 Affected: 19.3.0 Affected: 19.2.2 Affected: 19.2.099 Affected: 18.3.6 Affected: 18.3.7 Affected: 19.2.0 Affected: 18.3.8 Affected: 19.0.0 Affected: 19.1.0 Affected: 18.4.302 Affected: 18.4.303 Affected: 19.2.097 Affected: 19.2.098 Affected: 17.2.10 Affected: 18.3.6.1 Affected: 19.0.1a Affected: 18.2.0 Affected: 18.4.3 Affected: 18.4.1 Affected: 17.2.8 Affected: 18.3.3.1 Affected: 18.4.0 Affected: 18.3.1 Affected: 17.2.6 Affected: 17.2.9 Affected: 18.3.4 Affected: 17.2.5 Affected: 18.3.1.1 Affected: 18.3.5 Affected: 18.4.0.1 Affected: 18.3.3 Affected: 17.2.7 Affected: 18.3.0 Affected: 19.2.3 Affected: 18.4.501_ES Affected: 20.3.1 Affected: 20.1.2 Affected: 19.2.929 Affected: 19.2.31 Affected: 20.3.2 Affected: 19.2.32 Affected: 20.3.2.1 Affected: 20.3.2.1_927 Affected: 18.4.6 Affected: 20.3.2_928 Affected: 20.3.2_929 Affected: 20.4.1.0.1 Affected: 20.3.2.1_930 Affected: 19.2.4 Affected: 20.5.0.1.1 Affected: 20.4.1.1 Affected: 20.3.3 Affected: 19.2.4.0.1 Affected: 20.3.2_937 Affected: 20.5.1 Affected: 20.1.3 Affected: 20.3.3.0.4 Affected: 20.3.3.1.2 Affected: 20.3.3.1.1 Affected: 20.4.1.2 Affected: 20.3.3.0.2 Affected: 20.4.1.1.5 Affected: 20.4.1.0.02 Affected: 20.3.3.1.7 Affected: 20.3.3.1.5 Affected: 20.5.1.0.1 Affected: 20.3.3.1.10 Affected: 20.3.3.0.8 Affected: 20.4.2 Affected: 20.3.4 Affected: 20.3.3.0.14 Affected: 19.2.4.0.8 Affected: 19.2.4.0.9 Affected: 20.3.4.0.1 Affected: 20.3.2.0.5 Affected: 20.5.1.0.2 Affected: 20.6.1.1 Affected: 20.6.0.18.3 Affected: 20.3.2.0.6 Affected: 20.6.0.18.4 Affected: 20.4.2.0.2 Affected: 20.3.3.0.16 Affected: 20.6.1.0.1 Affected: 20.3.4.0.6 Affected: 20.7.1EFT2 Affected: 20.3.4.0.9 Affected: 20.3.4.0.11 Affected: 20.3.3.0.18 Affected: 20.6.2.1 Affected: 20.3.4.1 Affected: 20.4.2.1 Affected: 20.4.2.1.1 Affected: 20.3.4.1.1 Affected: 20.3.813 Affected: 20.3.4.0.19 Affected: 20.4.2.2.1 Affected: 20.5.1.2 Affected: 20.3.814 Affected: 20.4.2.2 Affected: 20.6.2.2 Affected: 20.3.4.2.1 Affected: 20.3.4.1.2 Affected: 20.3.4.0.20 Affected: 20.6.2.2.3 Affected: 20.4.2.2.2 Affected: 20.6.2.0.4 Affected: 20.3.4.0.24 Affected: 20.6.2.2.7 Affected: 20.3.4.2.2 Affected: 20.4.2.2.4 Affected: 20.3.5.0.8 Affected: 20.3.5.0.9 Affected: 20.3.5.0.7 Affected: 20.6.3.0.2 Affected: 20.9.1EFT2 Affected: 20.3.6 Affected: 20.3.7 Affected: 20.4.2.3 Affected: 20.3.5.1 Affected: 20.3.4.3 Affected: 20.3.3.2 Affected: 20.3.7.1 Affected: 20.3.4.0.25 Affected: 20.6.2.2.4 Affected: 20.6.1.2 Affected: 20.1.3.1 Affected: 20.6.5.1.4 Affected: 20.3.8 Affected: 20.12.501 Affected: 26.1.1 |
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"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"
}
]
}
],
"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."
}
],
"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."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-257",
"description": "Storing Passwords in a Recoverable Format",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-20T21:47:33.415Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-sdwan-authbp-qwCX8D4v",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v"
}
],
"source": {
"advisory": "cisco-sa-sdwan-authbp-qwCX8D4v",
"defects": [
"CSCws33585"
],
"discovery": "INTERNAL"
},
"title": "Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20128",
"datePublished": "2026-02-25T16:14:12.353Z",
"dateReserved": "2025-10-08T11:59:15.379Z",
"dateUpdated": "2026-04-21T03:55:31.648Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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