cisco-sa-ucsfxosxss-7skVE8ZvMediumCVSS 4.8

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

Published
February 25, 2026
Last Modified
February 25, 2026

🔗 CVE IDs covered (1)

CVE-2026-20091 →

📋 Description

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.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is part of the February 2026 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: February 2026 Semiannual Cisco FXOS and NX-OS Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75740"].

CVE-2026-20091 — Cisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability (CVSS 3.1 4.8, CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N)

🎯 Affected products230

  • Cisco Firepower 2100 Series
  • Cisco Firepower 4100 Series
  • Cisco Firepower 9000 Series
  • Cisco Firepower Extensible Operating System (FXOS)
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
  • Cisco Unified Computing System (Managed)
  • Cisco Firepower Extensible Operating System (FXOS) 2.14.1.131
  • Cisco Firepower Extensible Operating System (FXOS) 2.14.1.143
  • Cisco Firepower Extensible Operating System (FXOS) 2.14.1.163
  • Cisco Firepower Extensible Operating System (FXOS) 2.14.1.167
  • Cisco Firepower Extensible Operating System (FXOS) 2.16.0.128
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.2
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.1.3
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.1
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.5
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.2.9
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.12
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.2
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.7
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.3.9
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.10
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.13
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.18
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.2
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.24
  • Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12.4.26
  • +200 more not shown

✅ Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com Workarounds: There are no workarounds that address this vulnerability.

🔗 References (6)