{"id":"CVE-2026-20193","state":"PUBLISHED","title":"Cisco Identity Services Engine Authentication Bypass Vulnerability","description":"A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an authenticated, remote attacker with read-only Administrator privileges to gain unauthorized access to sensitive information on an affected device.\r\n\r\nThis vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized read access to sensitive RADIUS Policy details that are restricted for their role.","publishedAt":"2026-05-06T16:15:16.835Z","updatedAt":"2026-05-06T17:48:32.189Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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":"3.3.0","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":"3.3 Patch 4","status":"affected"},{"version":"3.4 Patch 1","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":"3.5 Patch 1","status":"affected"},{"version":"3.3 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"}]}],"references":["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/20xxx/CVE-2026-20193.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20193","state":"PUBLISHED","datePublished":"2026-05-06T16:15:16.835Z","dateUpdated":"2026-05-06T17:48:32.189Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2025-10-08T11:59:15.395Z"},"containers":{"cna":{"title":"Cisco Identity Services Engine Authentication Bypass Vulnerability","descriptions":[{"lang":"en","value":"A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an authenticated, remote attacker with read-only Administrator privileges to gain unauthorized access to sensitive information on an affected device.\r\n\r\nThis vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized read access to sensitive RADIUS Policy details that are restricted for their role."}],"affected":[{"vendor":"Cisco","product":"Cisco Identity Services Engine Software","defaultStatus":"unknown","versions":[{"version":"3.3.0","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":"3.3 Patch 4","status":"affected"},{"version":"3.4 Patch 1","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":"3.5 Patch 1","status":"affected"},{"version":"3.3 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"}]}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb","name":"cisco-sa-ise-unauth-bypass-uxjRXGpb"}],"metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","baseScore":4.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"Missing Authorization","type":"cwe"}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2026-05-06T16:15:16.835Z"},"exploits":[{"lang":"en","value":"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."}],"source":{"advisory":"cisco-sa-ise-unauth-bypass-uxjRXGpb","discovery":"EXTERNAL","defects":["CSCwr77441"]}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-06T17:35:13.146938Z","id":"CVE-2026-20193","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":"2026-05-06T17:48:32.189Z"}}]}}}