{"id":"CVE-2026-20309","state":"PUBLISHED","title":"Cisco Identity Services Engine Cross-Site Scripting Vulnerability","description":"A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to conduct a reflected cross-site scripting (XSS) attack against a user of the interface.\r\n\r\nThis vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. 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.","publishedAt":"2026-09-16T20:17:58.185Z","updatedAt":"2026-09-17T14:07:18.825Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","source":"cisco"},"assigner":"cisco","products":["Cisco Cisco Identity Services Engine Software"],"affected":[{"vendor":"Cisco","product":"Cisco Identity Services Engine Software","defaultStatus":"unknown","versions":[{"version":"3.1.0","status":"affected"},{"version":"3.1.0 p1","status":"affected"},{"version":"3.1.0 p3","status":"affected"},{"version":"3.1.0 p2","status":"affected"},{"version":"3.2.0","status":"affected"},{"version":"3.1.0 p4","status":"affected"},{"version":"3.1.0 p5","status":"affected"},{"version":"3.2.0 p1","status":"affected"},{"version":"3.1.0 p6","status":"affected"},{"version":"3.2.0 p2","status":"affected"},{"version":"3.1.0 p7","status":"affected"},{"version":"3.3.0","status":"affected"},{"version":"3.2.0 p3","status":"affected"},{"version":"3.2.0 p4","status":"affected"},{"version":"3.1.0 p8","status":"affected"},{"version":"3.2.0 p5","status":"affected"},{"version":"3.2.0 p6","status":"affected"},{"version":"3.1.0 p9","status":"affected"},{"version":"3.3 Patch 2","status":"affected"},{"version":"3.3 Patch 1","status":"affected"},{"version":"3.3 Patch 3","status":"affected"},{"version":"3.4.0","status":"affected"},{"version":"3.2.0 p7","status":"affected"},{"version":"3.3 Patch 4","status":"affected"},{"version":"3.4 Patch 1","status":"affected"},{"version":"3.1.0 p10","status":"affected"},{"version":"3.3 Patch 5","status":"affected"},{"version":"3.3 Patch 6","status":"affected"},{"version":"3.4 Patch 2","status":"affected"},{"version":"3.3 Patch 7","status":"affected"},{"version":"3.4 Patch 3","status":"affected"},{"version":"3.5.0","status":"affected"},{"version":"3.4 Patch 4","status":"affected"},{"version":"3.3 Patch 8","status":"affected"},{"version":"3.2 Patch 8","status":"affected"},{"version":"3.5 Patch 1","status":"affected"},{"version":"3.3 Patch 9","status":"affected"},{"version":"3.2 Patch 9","status":"affected"},{"version":"3.4 Patch 5","status":"affected"},{"version":"3.5 Patch 3","status":"affected"},{"version":"3.5 Patch 2","status":"affected"},{"version":"3.3 Patch 10","status":"affected"},{"version":"3.3 Patch 11","status":"affected"},{"version":"3.4 Patch 6","status":"affected"},{"version":"3.2 Patch 10","status":"affected"},{"version":"3.1.0 p72","status":"affected"},{"version":"3.1.0 p11","status":"affected"}]}],"references":["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xss-Uz9VWRQ"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/20xxx/CVE-2026-20309.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20309","state":"PUBLISHED","datePublished":"2026-09-16T20:17:58.185Z","dateUpdated":"2026-09-17T14:07:18.825Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2025-10-08T11:59:15.409Z"},"containers":{"cna":{"title":"Cisco Identity Services Engine Cross-Site Scripting Vulnerability","descriptions":[{"lang":"en","value":"A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to conduct a reflected cross-site scripting (XSS) attack against a user of the interface.\r\n\r\nThis vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. 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."}],"affected":[{"vendor":"Cisco","product":"Cisco Identity Services Engine Software","defaultStatus":"unknown","versions":[{"version":"3.1.0","status":"affected"},{"version":"3.1.0 p1","status":"affected"},{"version":"3.1.0 p3","status":"affected"},{"version":"3.1.0 p2","status":"affected"},{"version":"3.2.0","status":"affected"},{"version":"3.1.0 p4","status":"affected"},{"version":"3.1.0 p5","status":"affected"},{"version":"3.2.0 p1","status":"affected"},{"version":"3.1.0 p6","status":"affected"},{"version":"3.2.0 p2","status":"affected"},{"version":"3.1.0 p7","status":"affected"},{"version":"3.3.0","status":"affected"},{"version":"3.2.0 p3","status":"affected"},{"version":"3.2.0 p4","status":"affected"},{"version":"3.1.0 p8","status":"affected"},{"version":"3.2.0 p5","status":"affected"},{"version":"3.2.0 p6","status":"affected"},{"version":"3.1.0 p9","status":"affected"},{"version":"3.3 Patch 2","status":"affected"},{"version":"3.3 Patch 1","status":"affected"},{"version":"3.3 Patch 3","status":"affected"},{"version":"3.4.0","status":"affected"},{"version":"3.2.0 p7","status":"affected"},{"version":"3.3 Patch 4","status":"affected"},{"version":"3.4 Patch 1","status":"affected"},{"version":"3.1.0 p10","status":"affected"},{"version":"3.3 Patch 5","status":"affected"},{"version":"3.3 Patch 6","status":"affected"},{"version":"3.4 Patch 2","status":"affected"},{"version":"3.3 Patch 7","status":"affected"},{"version":"3.4 Patch 3","status":"affected"},{"version":"3.5.0","status":"affected"},{"version":"3.4 Patch 4","status":"affected"},{"version":"3.3 Patch 8","status":"affected"},{"version":"3.2 Patch 8","status":"affected"},{"version":"3.5 Patch 1","status":"affected"},{"version":"3.3 Patch 9","status":"affected"},{"version":"3.2 Patch 9","status":"affected"},{"version":"3.4 Patch 5","status":"affected"},{"version":"3.5 Patch 3","status":"affected"},{"version":"3.5 Patch 2","status":"affected"},{"version":"3.3 Patch 10","status":"affected"},{"version":"3.3 Patch 11","status":"affected"},{"version":"3.4 Patch 6","status":"affected"},{"version":"3.2 Patch 10","status":"affected"},{"version":"3.1.0 p72","status":"affected"},{"version":"3.1.0 p11","status":"affected"}]}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xss-Uz9VWRQ","name":"cisco-sa-ise-xss-Uz9VWRQ"}],"metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"cwe"}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2026-09-16T20:17:58.185Z"},"exploits":[{"lang":"en","value":"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}],"source":{"advisory":"cisco-sa-ise-xss-Uz9VWRQ","discovery":"EXTERNAL","defects":["CSCwt04611"]}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-17T14:06:23.690545Z","id":"CVE-2026-20309","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-17T14:07:18.825Z"}}]}}}