Improper authorization in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20126

 

Improper authorization in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20126

Published: February 25, 2026


Vulnerability identifier: #VU123269
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20126
CWE-ID: CWE-285
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insufficient authorization checks in the REST API. A local low-privileged user can execute arbitrary code with root privileges. 


Affected software

Catalyst SD-WAN Manager (formerly SD-WAN vManage)

How to mitigate CVE-2026-20126

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, 20.18.2.1

External References

Related Security Bulletins