{"id":"CVE-2026-50751","published":"2026-06-08T12:16:32Z","modified":"2026-08-04T05:16:39Z","title":"Check Point Security Gateway Improper Authentication Vulnerability","vendor":"Check Point","product":"Security Gateway","tier":"core","eol":null,"description":{"text":"A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password.","provenance":"source","from":"NVD"},"summary":{"text":"A logic flow weakness in the Remote Access and Mobile Access certificate validation within the deprecated IKEv1 key exchange of Check Point Security Gateway. An unauthenticated remote attacker, requiring no user interaction, can bypass user authentication and establish a remote access VPN connection without a valid user password.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:02:37Z"},"cvss":{"score":9.3,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.85338,"percentile":0.99717,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2026-06-08","dueDate":"2026-06-11","ransomware":true,"requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","notes":"https://blog.checkpoint.com/security/check-point-releases-important-hotfix-for-vulnerabilities-in-deprecated-ikev1-vpn-protocol/ ; https://support.checkpoint.com/results/sk/sk185033?_gl=1*1wqeqhc*_gcl_au*MTI1MzE5MjI2LjE3ODA5MzQ1NTM. ; https://nvd.nist.gov/vuln/detail/CVE-2026-50751","provenance":"source"},"vulncheckKev":{"dateAdded":"2026-06-08","exploitedFirstSeen":"2026-06-08","ransomware":true,"evidence":[{"url":"https://blog.checkpoint.com/security/check-point-releases-important-hotfix-for-vulnerabilities-in-deprecated-ikev1-vpn-protocol/","date":"2026-06-08"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2026-06-08"},{"url":"https://www.rapid7.com/blog/post/etr-critical-check-point-vpn-zero-day-exploited-in-the-wild-cve-2026-50751/","date":"2026-06-08"},{"url":"https://www.guidepointsecurity.com/wp-content/uploads/2026/07/GRIT_Q2_2026_Ransomware__Cyber_Threat_Insights_Report.pdf","date":"2026-07-09"},{"url":"https://www.recordedfuture.com/blog/june-2026-cve-landscape","date":"2026-07-10"},{"url":"https://insights.nccgroup.com/l/898251/2026-07-20/31nm9cf/898251/1784550525fBq76PZO/June_2026_Review_of_Q2___Cyber_Threat_Intelligence_Report___FREEMIUM.pdf","date":"2026-07-20"},{"url":"https://securelist.com/malware-report-q2-2026-pc-iot-statistics/120960/","date":"2026-08-10"},{"url":"https://medium.com/s2wblog/ransomware-landscape-in-h1-2026-statistics-and-key-issues-f15683e233cd","date":"2026-09-16"},{"url":"https://s2w.inc/en/resources/1124","date":"2026-10-08"}],"evidenceTotal":9,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 31, 2026","url":"https://otx.alienvault.com/pulse/6ae4aefab0c2191cecd41862","created":"2026-10-30"},{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"}],"provenance":"machine"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"references":[{"url":"https://support.checkpoint.com/results/sk/sk185033","tags":["Mitigation","Patch","Vendor Advisory"]},{"url":"https://blog.checkpoint.com/security/check-point-releases-important-hotfix-for-vulnerabilities-in-deprecated-ikev1-vpn-protocol/","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-50751","tags":["US Government Resource"]}],"techniques":[{"id":"T1133","name":"External Remote Services","tactics":["initial-access","persistence"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: remote VPN access via external service","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"allows an unauthenticated remote attacker to bypass user authentication","start":113,"end":184}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1078","name":"Valid Accounts","tactics":["initial-access","persistence","privilege-escalation","stealth"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: valid access obtained without credentials","mappingType":"primary_impact","evidence":[{"from":"description","quote":"establish a remote access VPN connection without a valid user password","start":189,"end":259}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2026-35047","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-35047","exploited":true,"exploitedSince":"2026-06-08","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":8,"skipped":0,"earliest":"2026-06-08","earliestUrl":"https://github.com/WadesWeaponShed/CVE-2026-50751-Mitigation-Scripts","repos":[{"name":"watchtowrlabs/watchTowr-vs-Check-Point-CVE-2026-50751","url":"https://github.com/watchtowrlabs/watchTowr-vs-Check-Point-CVE-2026-50751","stars":7,"created":"2026-06-10"},{"name":"0xredash/CVE-2026-50751","url":"https://github.com/0xredash/CVE-2026-50751","stars":2,"created":"2026-06-08"},{"name":"WadesWeaponShed/CVE-2026-50751-Mitigation-Scripts","url":"https://github.com/WadesWeaponShed/CVE-2026-50751-Mitigation-Scripts","stars":1,"created":"2026-06-08"},{"name":"fevar54/CVE-2026-50751---Check-Point-IKEv1-Authentication-Bypass-Exploit","url":"https://github.com/fevar54/CVE-2026-50751---Check-Point-IKEv1-Authentication-Bypass-Exploit","stars":1,"created":"2026-06-10"},{"name":"WadesWeaponShed/CheckPoint-CVE-Webscanner","url":"https://github.com/WadesWeaponShed/CheckPoint-CVE-Webscanner","stars":1,"created":"2026-06-18"}]},"nuclei":[{"id":"CVE-2026-50751","name":"Check Point IKEv1 Remote-Access VPN - Certificate Authentication Bypass","severity":"critical","path":"http/cves/2026/CVE-2026-50751.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-50751.yaml"}],"first":{"date":"2026-06-08","source":"PoC-in-GitHub","url":"https://github.com/WadesWeaponShed/CVE-2026-50751-Mitigation-Scripts"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1133"],"provenance":"ai"},{"stage":"primary","techniques":["T1078"],"provenance":"ai"}],"timeline":[{"date":"2026-06-08","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50751","provenance":"source"},{"date":"2026-06-08","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/WadesWeaponShed/CVE-2026-50751-Mitigation-Scripts","provenance":"source"},{"date":"2026-06-08","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV 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