{"id":"CVE-2025-11955","state":"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.","publishedAt":"2025-10-27T11:30:24.102Z","updatedAt":"2025-10-27T13:19:15.842Z","severity":{"score":8.2,"label":"High","version":"4.0","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","source":"INCIBE"},"assigner":"INCIBE","products":["TheGreenBow TheGreenBow VPN Client Windows Enterprise"],"affected":[{"vendor":"TheGreenBow","product":"TheGreenBow VPN Client Windows Enterprise","defaultStatus":"unaffected","versions":[{"version":"7.5","status":"affected"},{"version":"7.6","status":"affected"}]}],"references":["https://www.incibe.es/en/incibe-cert/notices/aviso/incorrect-validation-ocsp-certificates-thegreenbow-vpn-client-windows","https://www.thegreenbow.com/en/support/security-alerts/"],"weaknesses":["CWE-299"],"ingestedAt":"2026-10-29T20:08:31.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/11xxx/CVE-2025-11955.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-11955","state":"PUBLISHED","datePublished":"2025-10-27T11:30:24.102Z","dateUpdated":"2025-10-27T13:19:15.842Z","assignerShortName":"INCIBE","assignerOrgId":"0cbda920-cd7f-484a-8e76-bf7f4b7f4516","dateReserved":"2025-10-20T11:57:59.432Z"},"containers":{"cna":{"title":"Incorrect validation of OCSP certificates in TheGreenBow VPN Client Windows Enterprise","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"TheGreenBow","product":"TheGreenBow VPN Client Windows Enterprise","defaultStatus":"unaffected","versions":[{"version":"7.5","status":"affected"},{"version":"7.6","status":"affected"}]}],"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"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-299","description":"CWE-299: Improper Check for Certificate Revocation","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"INCIBE","orgId":"0cbda920-cd7f-484a-8e76-bf7f4b7f4516","dateUpdated":"2025-10-27T11:30:24.102Z"},"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:thegreenbow:thegreenbow_vpn_client_windows_enterprise:7.5:*:*:*:*:*:*:*","vulnerable":true},{"criteria":"cpe:2.3:a:thegreenbow:thegreenbow_vpn_client_windows_enterprise:7.6:*:*:*:*:*:*:*","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"datePublic":"2025-10-27T11:00:00.000Z","solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The feature that was vulnerable has been removed in the next minor version (version 7.7). It will be properly reintroduced in the next major version. To verify certificate revocation, it is recommended to use the CRL verification function of VPN clients."}],"value":"The feature that was vulnerable has been removed in the next minor version (version 7.7). It will be properly reintroduced in the next major version. To verify certificate revocation, it is recommended to use the CRL verification function of VPN clients."}],"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 0.4.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-10-27T13:19:04.165058Z","id":"CVE-2025-11955","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":"2025-10-27T13:19:15.842Z"}}]}}}