🔐 CVE Alert

CVE-2026-20091

MEDIUM 4.8

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

CVSS Score
4.8
EPSS Score
0.0%
EPSS Percentile
0th

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. 

CWE CWE-79
Vendor cisco
Product cisco firepower extensible operating system (fxos)
Ecosystems
Industries
NetworkingTelecommunications
Published Feb 25, 2026
Last Updated Feb 25, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Affected Versions

Cisco / Cisco Firepower Extensible Operating System (FXOS)
2.14.1.131 2.14.1.143 2.14.1.163 2.14.1.167 2.16.0.128
Cisco / Cisco Secure Firewall Adaptive Security Appliance (ASA) Software
9.12.2 9.12.1 9.12.3 9.12.4 9.12.3.2 9.12.3.12 9.12.2.5 9.12.1.2 9.12.2.1 9.12.3.7 9.12.2.9 9.12.3.9 9.12.1.3 9.12.4.2 9.12.4.4 9.12.4.7 9.12.4.8 9.12.4.10 9.12.4.13 9.12.4.18 9.12.4.24 9.16.1 9.12.4.26 9.16.1.28 9.12.4.29 9.16.2 9.12.4.30 9.16.2.3 9.12.4.35 9.16.2.7 9.12.4.37 9.17.1 9.16.2.11 9.16.2.13 9.12.4.39 9.12.4.38 9.16.2.14 9.17.1.7 9.12.4.40 9.16.3.3 9.16.3 9.17.1.9 9.16.3.14 9.12.4.41 9.17.1.10 9.18.1 9.12.4.47 9.16.3.15 9.18.1.3 9.17.1.11 9.12.4.48 9.18.2 9.16.3.19 9.17.1.13 9.12.4.50 9.17.1.15 9.12.4.52 9.16.3.23 9.18.2.5 9.16.4 9.12.4.54 9.17.1.20 9.18.2.7 9.19.1 9.16.4.9 9.12.4.55 9.18.2.8 9.16.4.14 9.18.3 9.19.1.5 9.12.4.56 9.17.1.30 9.19.1.9 9.18.3.39 9.16.4.19 9.12.4.58 9.19.1.12 9.18.3.46 9.16.4.27 9.19.1.18 9.18.3.53 9.18.3.55 9.16.4.38 9.17.1.33 9.12.4.62 9.16.4.39 9.18.3.56 9.16.4.42 9.19.1.22 9.18.4 9.18.4.5 9.19.1.24 9.16.4.48 9.18.4.8 9.20.2 9.19.1.27 9.12.4.65 9.16.4.55 9.18.4.22 9.20.2.10 9.16.4.57 9.19.1.28 9.17.1.39 9.12.4.67 9.18.4.24 9.20.2.21 9.16.4.61 9.19.1.31 9.18.4.29 9.20.2.22 9.16.4.62 9.18.4.34 9.20.3 9.16.4.67 9.18.4.40 9.16.4.71 9.20.3.4 9.18.4.47 9.20.3.7 9.17.1.45 9.19.1.37 9.16.4.76 9.18.4.50 9.20.3.10 9.18.4.52 9.20.3.13 9.18.4.53 9.16.4.82 9.20.3.16 9.19.1.42 9.18.4.57 9.16.4.84 9.20.3.20
Cisco / Cisco Unified Computing System (Managed)
4.0(4h) 4.1(1a) 4.0(1c) 4.0(4a) 4.0(1a) 4.0(1d) 4.1(1c) 4.0(2a) 4.0(4g) 4.0(2e) 4.0(4c) 4.0(4f) 4.0(1b) 4.0(2b) 4.0(2d) 4.1(1b) 4.0(4d) 4.0(4e) 4.0(4b) 4.1(2a) 4.1(1d) 4.0(4i) 4.1(1e) 4.1(2b) 4.0(4k) 4.1(3a) 4.1(3b) 4.1(2c) 4.0(4l) 4.1(4a) 4.1(3c) 4.1(3d) 4.2(1c) 4.2(1d) 4.0(4m) 4.1(3e) 4.2(1f) 4.1(3f) 4.2(1i) 4.1(3h) 4.2(1k) 4.2(1l) 4.0(4n) 4.2(1m) 4.1(3i) 4.2(2a) 4.2(1n) 4.1(3j) 4.2(2c) 4.2(2d) 4.2(3b) 4.1(3k) 4.0(4o) 4.2(2e) 4.2(3d) 4.2(3e) 4.2(3g) 4.1(3l) 4.3(2b) 4.2(3h) 4.2(3i) 4.3(2c) 4.1(3m) 4.3(2e) 4.3(3a) 4.2(3j) 4.3(3c) 4.3(4a) 4.2(3k) 4.3(4b) 4.3(4c) 4.2(3l) 4.3(4d) 4.3(2f) 4.2(3m) 4.3(5a) 4.3(4e) 4.1(3n) 4.3(4f) 4.2(3n) 4.3(5c) 4.2(3o) 4.3(5d) 4.3(5e) 4.2(3p)

References

NVD ↗ CVE.org ↗ EPSS Data ↗
sec.cloudapps.cisco.com: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsfxosxss-7skVE8Zv