What’s Vulnerable › Vulnerabilities
CVE-2026-20091: Cisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability
- Severity: medium (CVSS 4.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-02-25 · updated 2026-06-17
- Weakness: CWE-79
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
- Cisco ASA Software: 9.12.2, 9.12.1, 9.12.3, 9.12.4, 9.12.3.2, 9.12.3.12 (+127)
- 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 Unified Computing System (Managed): 4.0(4h), 4.1(1a), 4.0(1c), 4.0(4a), 4.0(1a), 4.0(1d) (+79)
References
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