Unprotected storage of credentials in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20128
Published: February 25, 2026 / Updated: April 20, 2026
Vulnerability identifier: #VU123270
CSH Severity: Low
CVSS v4: 6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N]
CVE-ID: CVE-2026-20128
CWE-ID: CWE-256
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a local user to gain access to other users' credentials.
The vulnerability exists due to presence of a credential file for the DCA user. A local user can view contents of the configuration file and gain access to passwords for 3rd party integration.
Affected software
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
How to mitigate CVE-2026-20128
Install updates from vendor's website.
Catalyst SD-WAN Manager (formerly SD-WAN vManage) - addressed in versions 20.9.8.2, 20.12.5.3, 20.12.6.1, 20.15.4.2