CVE-2026-20091

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

Published Feb 25, 2026 CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed

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. 

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Firepower Extensible Operating System (FXOS)

unknown

Version	Status	Constraints
`2.14.1.131`	affected	—
`2.14.1.143`	affected	—
`2.14.1.163`	affected	—
`2.14.1.167`	affected	—
`2.16.0.128`	affected	—

Cisco

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software

unknown

Version	Status	Constraints
`9.12.2`	affected	—
`9.12.1`	affected	—
`9.12.3`	affected	—
`9.12.4`	affected	—
`9.12.3.2`	affected	—
`9.12.3.12`	affected	—
`9.12.2.5`	affected	—
`9.12.1.2`	affected	—
`9.12.2.1`	affected	—
`9.12.3.7`	affected	—
`9.12.2.9`	affected	—
`9.12.3.9`	affected	—
`9.12.1.3`	affected	—
`9.12.4.2`	affected	—
`9.12.4.4`	affected	—
`9.12.4.7`	affected	—
`9.12.4.8`	affected	—
`9.12.4.10`	affected	—
`9.12.4.13`	affected	—
`9.12.4.18`	affected	—
`9.12.4.24`	affected	—
`9.16.1`	affected	—
`9.12.4.26`	affected	—
`9.16.1.28`	affected	—
`9.12.4.29`	affected	—
`9.16.2`	affected	—
`9.12.4.30`	affected	—
`9.16.2.3`	affected	—
`9.12.4.35`	affected	—
`9.16.2.7`	affected	—
`9.12.4.37`	affected	—
`9.17.1`	affected	—
`9.16.2.11`	affected	—
`9.16.2.13`	affected	—
`9.12.4.39`	affected	—
`9.12.4.38`	affected	—
`9.16.2.14`	affected	—
`9.17.1.7`	affected	—
`9.12.4.40`	affected	—
`9.16.3.3`	affected	—
`9.16.3`	affected	—
`9.17.1.9`	affected	—
`9.16.3.14`	affected	—
`9.12.4.41`	affected	—
`9.17.1.10`	affected	—
`9.18.1`	affected	—
`9.12.4.47`	affected	—
`9.16.3.15`	affected	—
`9.18.1.3`	affected	—
`9.17.1.11`	affected	—
`9.12.4.48`	affected	—
`9.18.2`	affected	—
`9.16.3.19`	affected	—
`9.17.1.13`	affected	—
`9.12.4.50`	affected	—
`9.17.1.15`	affected	—
`9.12.4.52`	affected	—
`9.16.3.23`	affected	—
`9.18.2.5`	affected	—
`9.16.4`	affected	—
`9.12.4.54`	affected	—
`9.17.1.20`	affected	—
`9.18.2.7`	affected	—
`9.19.1`	affected	—
`9.16.4.9`	affected	—
`9.12.4.55`	affected	—
`9.18.2.8`	affected	—
`9.16.4.14`	affected	—
`9.18.3`	affected	—
`9.19.1.5`	affected	—
`9.12.4.56`	affected	—
`9.17.1.30`	affected	—
`9.19.1.9`	affected	—
`9.18.3.39`	affected	—
`9.16.4.19`	affected	—
`9.12.4.58`	affected	—
`9.19.1.12`	affected	—
`9.18.3.46`	affected	—
`9.16.4.27`	affected	—
`9.19.1.18`	affected	—
`9.18.3.53`	affected	—
`9.18.3.55`	affected	—
`9.16.4.38`	affected	—
`9.17.1.33`	affected	—
`9.12.4.62`	affected	—
`9.16.4.39`	affected	—
`9.18.3.56`	affected	—
`9.16.4.42`	affected	—
`9.19.1.22`	affected	—
`9.18.4`	affected	—
`9.18.4.5`	affected	—
`9.19.1.24`	affected	—
`9.16.4.48`	affected	—
`9.18.4.8`	affected	—
`9.20.2`	affected	—
`9.19.1.27`	affected	—
`9.12.4.65`	affected	—
`9.16.4.55`	affected	—
`9.18.4.22`	affected	—
`9.20.2.10`	affected	—
`9.16.4.57`	affected	—
`9.19.1.28`	affected	—
`9.17.1.39`	affected	—
`9.12.4.67`	affected	—
`9.18.4.24`	affected	—
`9.20.2.21`	affected	—
`9.16.4.61`	affected	—
`9.19.1.31`	affected	—
`9.18.4.29`	affected	—
`9.20.2.22`	affected	—
`9.16.4.62`	affected	—
`9.18.4.34`	affected	—
`9.20.3`	affected	—
`9.16.4.67`	affected	—
`9.18.4.40`	affected	—
`9.16.4.71`	affected	—
`9.20.3.4`	affected	—
`9.18.4.47`	affected	—
`9.20.3.7`	affected	—
`9.17.1.45`	affected	—
`9.19.1.37`	affected	—
`9.16.4.76`	affected	—
`9.18.4.50`	affected	—
`9.20.3.10`	affected	—
`9.18.4.52`	affected	—
`9.20.3.13`	affected	—
`9.18.4.53`	affected	—
`9.16.4.82`	affected	—
`9.20.3.16`	affected	—
`9.19.1.42`	affected	—
`9.18.4.57`	affected	—
`9.16.4.84`	affected	—
`9.20.3.20`	affected	—

Cisco

Cisco Unified Computing System (Managed)

unknown

Version	Status	Constraints
`4.0(4h)`	affected	—
`4.1(1a)`	affected	—
`4.0(1c)`	affected	—
`4.0(4a)`	affected	—
`4.0(1a)`	affected	—
`4.0(1d)`	affected	—
`4.1(1c)`	affected	—
`4.0(2a)`	affected	—
`4.0(4g)`	affected	—
`4.0(2e)`	affected	—
`4.0(4c)`	affected	—
`4.0(4f)`	affected	—
`4.0(1b)`	affected	—
`4.0(2b)`	affected	—
`4.0(2d)`	affected	—
`4.1(1b)`	affected	—
`4.0(4d)`	affected	—
`4.0(4e)`	affected	—
`4.0(4b)`	affected	—
`4.1(2a)`	affected	—
`4.1(1d)`	affected	—
`4.0(4i)`	affected	—
`4.1(1e)`	affected	—
`4.1(2b)`	affected	—
`4.0(4k)`	affected	—
`4.1(3a)`	affected	—
`4.1(3b)`	affected	—
`4.1(2c)`	affected	—
`4.0(4l)`	affected	—
`4.1(4a)`	affected	—
`4.1(3c)`	affected	—
`4.1(3d)`	affected	—
`4.2(1c)`	affected	—
`4.2(1d)`	affected	—
`4.0(4m)`	affected	—
`4.1(3e)`	affected	—
`4.2(1f)`	affected	—
`4.1(3f)`	affected	—
`4.2(1i)`	affected	—
`4.1(3h)`	affected	—
`4.2(1k)`	affected	—
`4.2(1l)`	affected	—
`4.0(4n)`	affected	—
`4.2(1m)`	affected	—
`4.1(3i)`	affected	—
`4.2(2a)`	affected	—
`4.2(1n)`	affected	—
`4.1(3j)`	affected	—
`4.2(2c)`	affected	—
`4.2(2d)`	affected	—
`4.2(3b)`	affected	—
`4.1(3k)`	affected	—
`4.0(4o)`	affected	—
`4.2(2e)`	affected	—
`4.2(3d)`	affected	—
`4.2(3e)`	affected	—
`4.2(3g)`	affected	—
`4.1(3l)`	affected	—
`4.3(2b)`	affected	—
`4.2(3h)`	affected	—
`4.2(3i)`	affected	—
`4.3(2c)`	affected	—
`4.1(3m)`	affected	—
`4.3(2e)`	affected	—
`4.3(3a)`	affected	—
`4.2(3j)`	affected	—
`4.3(3c)`	affected	—
`4.3(4a)`	affected	—
`4.2(3k)`	affected	—
`4.3(4b)`	affected	—
`4.3(4c)`	affected	—
`4.2(3l)`	affected	—
`4.3(4d)`	affected	—
`4.3(2f)`	affected	—
`4.2(3m)`	affected	—
`4.3(5a)`	affected	—
`4.3(4e)`	affected	—
`4.1(3n)`	affected	—
`4.3(4f)`	affected	—
`4.2(3n)`	affected	—
`4.3(5c)`	affected	—
`4.2(3o)`	affected	—
`4.3(5d)`	affected	—
`4.3(5e)`	affected	—
`4.2(3p)`	affected	—

No data.

Vendor Product Versions

Cisco

Cisco:adaptive Security Appliance Software

Version	Status	Scheme	Platform
`9.12.2`	affected	semver	—
`9.12.1`	affected	semver	—
`9.12.3`	affected	semver	—
`9.12.4`	affected	semver	—
`9.12.3.2`	affected	generic	—
`9.12.3.12`	affected	generic	—
`9.12.2.5`	affected	generic	—
`9.12.1.2`	affected	generic	—
`9.12.2.1`	affected	generic	—
`9.12.3.7`	affected	generic	—
`9.12.2.9`	affected	generic	—
`9.12.3.9`	affected	generic	—
`9.12.1.3`	affected	generic	—
`9.12.4.2`	affected	generic	—
`9.12.4.4`	affected	generic	—
`9.12.4.7`	affected	generic	—
`9.12.4.8`	affected	generic	—
`9.12.4.10`	affected	generic	—
`9.12.4.13`	affected	generic	—
`9.12.4.18`	affected	generic	—
`9.12.4.24`	affected	generic	—
`9.16.1`	affected	semver	—
`9.12.4.26`	affected	generic	—
`9.16.1.28`	affected	semver	—
`9.12.4.29`	affected	generic	—
`9.16.2`	affected	semver	—
`9.12.4.30`	affected	generic	—
`9.16.2.3`	affected	generic	—
`9.12.4.35`	affected	generic	—
`9.16.2.7`	affected	generic	—
`9.12.4.37`	affected	generic	—
`9.17.1`	affected	semver	—
`9.16.2.11`	affected	semver	—
`9.16.2.13`	affected	generic	—
`9.12.4.39`	affected	generic	—
`9.12.4.38`	affected	generic	—
`9.16.2.14`	affected	generic	—
`9.17.1.7`	affected	generic	—
`9.12.4.40`	affected	generic	—
`9.16.3.3`	affected	generic	—
`9.16.3`	affected	semver	—
`9.17.1.9`	affected	semver	—
`9.16.3.14`	affected	generic	—
`9.12.4.41`	affected	generic	—
`9.17.1.10`	affected	generic	—
`9.18.1`	affected	semver	—
`9.12.4.47`	affected	generic	—
`9.16.3.15`	affected	generic	—
`9.18.1.3`	affected	generic	—
`9.17.1.11`	affected	semver	—
`9.12.4.48`	affected	generic	—
`9.18.2`	affected	semver	—
`9.16.3.19`	affected	generic	—
`9.17.1.13`	affected	generic	—
`9.12.4.50`	affected	generic	—
`9.17.1.15`	affected	generic	—
`9.12.4.52`	affected	generic	—
`9.16.3.23`	affected	generic	—
`9.18.2.5`	affected	generic	—
`9.16.4`	affected	semver	—
`9.12.4.54`	affected	generic	—
`9.17.1.20`	affected	generic	—
`9.18.2.7`	affected	generic	—
`9.19.1`	affected	semver	—
`9.16.4.9`	affected	generic	—
`9.12.4.55`	affected	generic	—
`9.18.2.8`	affected	generic	—
`9.16.4.14`	affected	generic	—
`9.18.3`	affected	semver	—
`9.19.1.5`	affected	generic	—
`9.12.4.56`	affected	generic	—
`9.17.1.30`	affected	generic	—
`9.19.1.9`	affected	generic	—
`9.18.3.39`	affected	generic	—
`9.16.4.19`	affected	generic	—
`9.12.4.58`	affected	generic	—
`9.19.1.12`	affected	generic	—
`9.18.3.46`	affected	generic	—
`9.16.4.27`	affected	generic	—
`9.19.1.18`	affected	generic	—
`9.18.3.53`	affected	generic	—
`9.18.3.55`	affected	generic	—
`9.16.4.38`	affected	generic	—
`9.17.1.33`	affected	generic	—
`9.12.4.62`	affected	generic	—
`9.16.4.39`	affected	generic	—
`9.18.3.56`	affected	generic	—
`9.16.4.42`	affected	generic	—
`9.19.1.22`	affected	generic	—
`9.18.4`	affected	generic	—
`9.18.4.5`	affected	generic	—
`9.19.1.24`	affected	generic	—
`9.16.4.48`	affected	generic	—
`9.18.4.8`	affected	generic	—
`9.20.2`	affected	semver	—
`9.19.1.27`	affected	generic	—
`9.12.4.65`	affected	generic	—
`9.16.4.55`	affected	generic	—
`9.18.4.22`	affected	generic	—
`9.20.2.10`	affected	generic	—
`9.16.4.57`	affected	generic	—
`9.19.1.28`	affected	generic	—
`9.17.1.39`	affected	generic	—
`9.12.4.67`	affected	generic	—
`9.18.4.24`	affected	generic	—
`9.20.2.21`	affected	generic	—
`9.16.4.61`	affected	generic	—
`9.19.1.31`	affected	generic	—
`9.18.4.29`	affected	generic	—
`9.20.2.22`	affected	generic	—
`9.16.4.62`	affected	generic	—
`9.18.4.34`	affected	generic	—
`9.20.3`	affected	semver	—
`9.16.4.67`	affected	generic	—
`9.18.4.40`	affected	generic	—
`9.16.4.71`	affected	generic	—
`9.20.3.4`	affected	generic	—
`9.18.4.47`	affected	generic	—
`9.20.3.7`	affected	generic	—
`9.19.1.42`	affected	generic	—
`9.18.4.57`	affected	generic	—
`9.16.4.84`	affected	generic	—
`9.20.3.20`	affected	generic	—

Cisco

Firepower Extensible Operating System

Version	Status	Scheme	Platform
`2.14.1.131`	affected	generic	—
`2.14.1.143`	affected	generic	—
`2.14.1.163`	affected	generic	—
`2.14.1.167`	affected	generic	—
`2.16.0.128`	affected	generic	—

Cisco

Unified Computing System Manager

Version	Status	Scheme	Platform
`4.0(4h)`	affected	generic	—
`4.1(1a)`	affected	generic	—
`4.0(1c)`	affected	generic	—
`4.0(4a)`	affected	generic	—
`4.0(1a)`	affected	generic	—
`4.0(1d)`	affected	generic	—
`4.1(1c)`	affected	generic	—
`4.0(2a)`	affected	generic	—
`4.0(4g)`	affected	generic	—
`4.0(2e)`	affected	generic	—
`4.0(4c)`	affected	generic	—
`4.0(4f)`	affected	generic	—
`4.0(1b)`	affected	generic	—
`4.0(2b)`	affected	generic	—
`4.0(2d)`	affected	generic	—
`4.1(1b)`	affected	generic	—
`4.0(4d)`	affected	generic	—
`4.0(4e)`	affected	generic	—
`4.0(4b)`	affected	generic	—
`4.1(2a)`	affected	generic	—
`4.1(1d)`	affected	generic	—
`4.0(4i)`	affected	generic	—
`4.1(1e)`	affected	generic	—
`4.1(2b)`	affected	generic	—
`4.0(4k)`	affected	generic	—
`4.1(3a)`	affected	generic	—
`4.1(3b)`	affected	generic	—
`4.1(2c)`	affected	generic	—
`4.0(4l)`	affected	generic	—
`4.1(4a)`	affected	generic	—
`4.1(3c)`	affected	generic	—
`4.1(3d)`	affected	generic	—
`4.2(1c)`	affected	generic	—
`4.2(1d)`	affected	generic	—
`4.0(4m)`	affected	generic	—
`4.1(3e)`	affected	generic	—
`4.2(1f)`	affected	generic	—
`4.1(3f)`	affected	generic	—
`4.2(1i)`	affected	generic	—
`4.1(3h)`	affected	generic	—
`4.2(1k)`	affected	generic	—
`4.2(1l)`	affected	generic	—
`4.0(4n)`	affected	generic	—
`4.2(1m)`	affected	generic	—
`4.1(3i)`	affected	generic	—
`4.2(2a)`	affected	generic	—
`4.2(1n)`	affected	generic	—
`4.1(3j)`	affected	generic	—
`4.2(2c)`	affected	generic	—
`4.2(2d)`	affected	generic	—
`4.2(3b)`	affected	generic	—
`4.1(3k)`	affected	generic	—
`4.0(4o)`	affected	generic	—
`4.2(2e)`	affected	generic	—
`4.2(3d)`	affected	generic	—
`4.2(3e)`	affected	generic	—
`4.2(3g)`	affected	generic	—
`4.1(3l)`	affected	generic	—
`4.3(2b)`	affected	generic	—
`4.2(3h)`	affected	generic	—
`4.2(3i)`	affected	generic	—
`4.3(2c)`	affected	generic	—
`4.3(2e)`	affected	generic	—
`4.3(2f)`	affected	generic	—
`4.2(3m)`	affected	generic	—
`4.3(2b)`	affected	generic	—
`4.2(3h)`	affected	generic	—
`4.2(3i)`	affected	generic	—
`4.3(2c)`	affected	generic	—
`4.3(2e)`	affected	generic	—
`4.3(2f)`	affected	generic	—
`4.2(3m)`	affected	generic	—
`4.3(2b)`	affected	generic	—
`4.2(3h)`	affected	generic	—
`4.2(3i)`	affected	generic	—
`4.3(2c)`	affected	generic	—
`4.3(2e)`	affected	generic	—
`4.3(2f)`	affected	generic	—
`4.2(3m)`	affected	generic	—
`4.3(2b)`	affected	generic	—
`4.2(3h)`	affected	generic	—
`4.2(3i)`	affected	generic	—
`4.3(2c)`	affected	generic	—
`4.3(2e)`	affected	generic	—
`4.3(2f)`	affected	generic	—
`4.2(3m)`	affected	generic	—
`4.3(2b)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.202% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsfxosxss-7skVE8Zv

History

Feb 27, 2026 3:15 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Feb 26, 2026 1:30 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco cisco:adaptive Security Appliance Software Cisco firepower Extensible Operating System Cisco unified Computing System Manager
Vendors & Products		Cisco Cisco cisco:adaptive Security Appliance Software Cisco firepower Extensible Operating System Cisco unified Computing System Manager

Feb 25, 2026 5:15 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		Cisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability
Weaknesses		CWE-79
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsfxosxss-7skVE8Zv
Metrics		cvssV3_1 `{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'}`