#VU123268 Improper authentication in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20129

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Main Vulnerability Database Vulnerabilities #VU123268

#VU123268 Improper authentication in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20129

Published: February 25, 2026


Vulnerability identifier: #VU123268
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Red
CVE-ID: CVE-2026-20129
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in the API user authentication mechanism. A remote non-authenticated attacker can bypass authentication process and access the affected system under netadmin role. 


Remediation

Install updates from vendor's website.

External links