Improper access control in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20133
Published: February 25, 2026 / Updated: April 20, 2026
Vulnerability identifier: #VU123271
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-20133
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.
The vulnerability exists due to improper access restrictions within the API. A remote non-authenticated attacker can bypass implemented security restrictions and gain access to sensitive information.
Affected software
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
How to mitigate CVE-2026-20133
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