CVE-2026-20091CWE-79

Cisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability

Medium · published February 25, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
7.2
In the wild
Unconfirmed
What it is

A vulnerability in the web-based management interface of Cisco FXOS Software and Cisco UCS Manager Software could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface.

This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit this vulnerability by injecting malicious data into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit this vulnerability, the attacker must have valid credentials for a user account with the role of Administrator or AAA Administrator. 

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00180 · 7.2th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-25T16:24Z
EPSS history
Timeline
  • 25 FEB 16:24Z
    Cisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability
    cvelistv5