{"id":"CVE-2026-76447","title":"A vulnerability in the Online Certificate Status Protocol (OCSP) responder of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to cause an administrative reload of the OCSP responder certificate and key materia…","summary":"A vulnerability in the Online Certificate Status Protocol (OCSP) responder of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to cause an administrative reload of the OCSP responder certificate and key materia…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-306"],"vendor":"cisco","product":"identity_services_engine_passive_identity_connector","affected":["identity_services_engine_passive_identity_connector < 3.3.0","identity_services_engine_passive_identity_connector = 3.3.0","identity_services_engine_passive_identity_connector = 3.4.0","identity_services_engine < 3.3.0","identity_services_engine = 3.3.0","identity_services_engine = 3.4.0","identity_services_engine = 3.5.0"],"patched":["identity_services_engine_passive_identity_connector 3.3.0","identity_services_engine 3.3.0"],"published":"2026-09-16","updated":"2026-09-28","sourceUpdated":"2026-09-28T13:09:41.163","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76447","references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multiauth-bypass-sgD2HbL4","label":"psirt@cisco.com"},{"url":"https://software.cisco.com"}],"tags":["nvd","cve.org","csaf","vendor-advisory","cisco"],"epss":0.00376,"epssPercentile":0.31356,"ingestedAt":"2026-09-16T16:37:52.179Z","slug":"CVE-2026-76447","body":"## Overview\n\nA vulnerability in the Online Certificate Status Protocol (OCSP) responder of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to cause an administrative reload of the OCSP responder certificate and key material.\r\n\r\nThis vulnerability is due to missing authentication on a function of the OCSP responder. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to cause the OCSP responder to reload certificate and key material on demand.\n\n## Affected\n\n- `identity_services_engine_passive_identity_connector < 3.3.0`\n- `identity_services_engine_passive_identity_connector = 3.3.0`\n- `identity_services_engine_passive_identity_connector = 3.4.0`\n- `identity_services_engine < 3.3.0`\n- `identity_services_engine = 3.3.0`\n- `identity_services_engine = 3.4.0`\n- `identity_services_engine = 3.5.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `identity_services_engine_passive_identity_connector 3.3.0`\n- `identity_services_engine 3.3.0`\n\n## Vendor advisories\n\n- **cisco-sa-ise-multiauth-bypass-sgD2HbL4** · Cisco · affected: Cisco ISE Passive Identity Connector (4 versions), Cisco Identity Services Engine Software (46 versions) · updated 2026-09-24 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multiauth-bypass-sgD2HbL4)","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}