Stored cross-site scripting in Cisco UCS Manager - CVE-2026-20091
Published: February 26, 2026
Vulnerability identifier: #VU123284
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-20091
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote user to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the web-based management interface. A remote user with Administrator or AAA Administrator role can permanenlty inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Affected software
Cisco UCS Manager
How to mitigate CVE-2026-20091
Install updates from vendor's website.
Cisco UCS Manager - update to 4.3(6a)