{"id":"CVE-2026-20091","aliases":["EUVD-2026-8670","GHSA-4pqc-pmx6-jgc9"],"status":"published","title":"Cisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability","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.\r\n\r\nThis 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,\u0026nbsp;the attacker must have valid credentials for a user account with the role of Administrator or AAA Administrator.\u0026nbsp;","severity":{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00202,"percentile":0.10256,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-02-25T16:24:44Z","modified":"2026-06-17T10:17:04Z","products":[{"vendor":"cisco","product":"cisco firepower extensible operating system (fxos)"},{"vendor":"cisco","product":"cisco secure firewall adaptive security appliance (asa) software"},{"vendor":"cisco","product":"cisco unified computing system (managed)"}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucsfxosxss-7skVE8Zv"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20091"},{"url":"https://github.com/advisories/GHSA-4pqc-pmx6-jgc9"}],"sources":{"cve":[{"id":"CVE-2026-20091","title":"Cisco UCS Manager and FXOS Software Stored Cross-Site Scripting Vulnerability","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.\r\n\r\nThis 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,\u0026nbsp;the attacker must have valid credentials for a user account with the role of Administrator or AAA Administrator.\u0026nbsp;","status":"published","published":"2026-02-25T16:24:44.412Z","modified":"2026-02-25T19:05:48.712Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T13:35:33.380441Z"}],"euvd":[{"id":"EUVD-2026-8670","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.\r\n\r\nThis 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,\u0026nbsp;the attacker must have valid credentials for a user account with the role of Administrator or AAA Administrator.\u0026nbsp;","status":"published","published":"2026-02-25T16:24:44Z","modified":"2026-02-25T19:05:48Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:48:28.530473Z"}],"ghsa":[{"id":"GHSA-4pqc-pmx6-jgc9","title":"A vulnerability in the web-based management interface of Cisco FXOS Software and Cisco UCS...","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.\n\nThis 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,\u0026nbsp;the attacker must have valid credentials for a user account with the role of Administrator or AAA Administrator.\u0026nbsp;","status":"published","published":"2026-02-25T18:31:38Z","modified":"2026-02-25T18:31:45Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:06:22.774985Z"}],"nvd":[{"id":"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.\r\n\r\nThis 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,\u0026nbsp;the attacker must have valid credentials for a user account with the role of Administrator or AAA Administrator.\u0026nbsp;","status":"published","published":"2026-02-25T17:25:26.83Z","modified":"2026-06-17T10:17:04.43Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:07.027269Z"}]}}