{"id":"CVE-2025-11955","aliases":["EUVD-2025-36160","GHSA-8cw5-pxrw-vqhc"],"status":"published","title":"Incorrect validation of OCSP certificates in TheGreenBow VPN Client Windows Enterprise","description":"Incorrect validation of OCSP certificates vulnerability in TheGreenBow VPN, versions 7.5 and 7.6. During the IKEv2 authentication step, the OCSP-enabled VPN client establishes the tunnel even if it does not receive an OCSP response or if the OCSP response signature is invalid.","severity":{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00211,"percentile":0.11363,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-299"],"published":"2025-10-27T11:30:24Z","modified":"2026-10-08T11:10:00Z","products":[{"vendor":"thegreenbow","product":"thegreenbow vpn client windows enterprise"}],"references":[{"url":"https://www.incibe.es/en/incibe-cert/notices/aviso/incorrect-validation-ocsp-certificates-thegreenbow-vpn-client-windows"},{"url":"https://www.thegreenbow.com/en/support/security-alerts/","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-11955"},{"url":"https://www.thegreenbow.com/en/support/security-alerts"},{"url":"https://github.com/advisories/GHSA-8cw5-pxrw-vqhc"}],"sources":{"cve":[{"id":"CVE-2025-11955","title":"Incorrect validation of OCSP certificates in TheGreenBow VPN Client Windows Enterprise","description":"Incorrect validation of OCSP certificates vulnerability in TheGreenBow VPN, versions 7.5 and 7.6. During the IKEv2 authentication step, the OCSP-enabled VPN client establishes the tunnel even if it does not receive an OCSP response or if the OCSP response signature is invalid.","status":"published","published":"2025-10-27T11:30:24.102Z","modified":"2025-10-27T13:19:15.842Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-299"],"updated_at":"2026-11-02T14:32:50.872559Z"}],"euvd":[{"id":"EUVD-2025-36160","description":"Incorrect validation of OCSP certificates vulnerability in TheGreenBow VPN, versions 7.5 and 7.6. During the IKEv2 authentication step, the OCSP-enabled VPN client establishes the tunnel even if it does not receive an OCSP response or if the OCSP response signature is invalid.","status":"published","published":"2025-10-27T11:30:24Z","modified":"2025-10-27T13:19:15Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:49:37.392201Z"}],"ghsa":[{"id":"GHSA-8cw5-pxrw-vqhc","title":"Incorrect validation of OCSP certificates vulnerability in TheGreenBow VPN, versions 7.5 and 7.6....","description":"Incorrect validation of OCSP certificates vulnerability in TheGreenBow VPN, versions 7.5 and 7.6. During the IKEv2 authentication step, the OCSP-enabled VPN client establishes the tunnel even if it does not receive an OCSP response or if the OCSP response signature is invalid.","status":"published","published":"2025-10-27T12:32:52Z","modified":"2025-10-27T12:32:52Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"cwes":["CWE-299"],"updated_at":"2026-11-02T15:04:13.776182Z"}],"nvd":[{"id":"CVE-2025-11955","description":"Incorrect validation of OCSP certificates vulnerability in TheGreenBow VPN, versions 7.5 and 7.6. During the IKEv2 authentication step, the OCSP-enabled VPN client establishes the tunnel even if it does not receive an OCSP response or if the OCSP response signature is invalid.","status":"published","published":"2025-10-27T12:15:32.67Z","modified":"2026-10-08T11:10:00.25Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-299"],"updated_at":"2026-11-02T14:11:40.754193Z"}]}}