CVE-2026-20091 - Vulnerability Details

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. 

Published: 2026-02-25

Score: 4.8 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

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 Confidence Versions

Cisco

Cisco:adaptive Security Appliance Software

100%

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

88%

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

89%

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	—

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Remediation

No remediation available yet.

Tracking

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Advisories

No advisories yet.

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.

The EPSS score is 0.00039.

Exploitation none

Automatable no

Technical Impact partial

References

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

History

Fri, 27 Feb 2026 03:15:00 +0000

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

Thu, 26 Feb 2026 13:30:00 +0000

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

Wed, 25 Feb 2026 17:15:00 +0000

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'}`

Subscriptions

Cisco Cisco:adaptive Security Appliance Software Firepower Extensible Operating System Unified Computing System Manager

MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2026-02-25T16:24:44.412Z

Updated: 2026-02-25T19:05:48.712Z

Reserved: 2025-10-08T11:59:15.368Z

Link: CVE-2026-20091

Vulnrichment

Updated: 2026-02-25T18:17:47.436Z

NVD

Status : Awaiting Analysis

Published: 2026-02-25T17:25:26.830

Modified: 2026-02-27T14:06:59.787

Link: CVE-2026-20091

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-02-26T13:15:26Z

Weaknesses

CWE-79

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

Exploitation none

Automatable no

Technical Impact partial

Subscriptions

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