# CVE-2026-20128: Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability

> CVE-2026-20128: Cisco Catalyst SD-WAN Manager Information Disclosure Vulnerability. CVSS 7.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-20128
Last updated: 2026-06-17T10:17:10Z

- Published: 2026-02-25 16:14 UTC · Updated: 2026-06-17 10:17 UTC · Assigner: cisco
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS: 7.3%, 94th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-04-20, federal due date 2026-04-23, ransomware use: Unknown
- CWE: CWE-257

## Description

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.

## CISA 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.

## Affected vendors and products

- Cisco: Cisco Catalyst SD-WAN Manager

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-20128)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-20128)
- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-20128 · Markdown: https://rewindex.com/cve/CVE-2026-20128.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-20128 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:05:41.574Z