CVE-2026-20128 - Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability

Technical Severity

CVSS v3.1 Metrics

HIGH

7.5 / 10

Minimal Risk Critical

Vector Specification

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Exploitation Likelihood

EPSS Prediction

0.06 %

Predictive Probability

Percentile Rank

19.3 th

Documented as more likely to be exploited than 19.3% of known CVEs.

Detection Date

Apr 20, 2026

Remediation Due

Apr 23, 2026

CISA Catalog Active

Threat Analysis

Cisco Catalyst SD-WAN Manager contains a storing passwords in a recoverable format vulnerability that allows an authenticated, local attacker to gain DCA user privileges by accessing a credential file for the DCA user on the filesystem as a low-privileged user.

Remediation Directive

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.

External Intelligence

CISA

CISA Advisory

https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems

CISA

CISA Advisory

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

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2026-20128