Improper Encoding or Escaping of Output in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20245
Published: June 5, 2026 / Updated: August 31, 2026
Vulnerability identifier: #VU133402
CSH Severity: High
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-2026-20245
CWE-ID: CWE-116
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to insufficient validation of user-supplied input in the CLI. A local user can upload a specially crafted file and elevate privileges on the target system.
Note, the vulnerability is being actively exploited in the wild.
Affected software
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
How to mitigate CVE-2026-20245
Install update from vendor's website.
Catalyst SD-WAN Manager (formerly SD-WAN vManage) - addressed in versions 20.9.9.2, 20.12.7.2, 20.15.4.5, 20.15.5.3, 20.18.3.1, 26.1.1.2