{"id":"CVE-2026-50752","aliases":["EUVD-2026-35046","GHSA-89xv-5cj4-39m4"],"status":"published","title":"Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1","description":"A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.04727,"percentile":0.9191,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2026-06-08T11:00:38Z","modified":"2026-07-23T07:10:00Z","products":[{"vendor":"checkpoint","product":"quantum security gateway"},{"vendor":"checkpoint","product":"spark firewalls"}],"references":[{"url":"https://support.checkpoint.com/results/sk/sk185035"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50752"},{"url":"https://github.com/advisories/GHSA-89xv-5cj4-39m4"}],"sources":{"cve":[{"id":"CVE-2026-50752","title":"Certificate Validation Bypass in VPN Site-to-Site Connections Using IKEv1","description":"A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.","status":"published","published":"2026-06-08T11:00:38.563Z","modified":"2026-06-10T13:36:24.946Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:20:09.098623Z"}],"euvd":[{"id":"EUVD-2026-35046","description":"A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.","status":"published","published":"2026-06-08T11:00:38Z","modified":"2026-06-10T13:36:24Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T18:20:45.405546Z"}],"ghsa":[{"id":"GHSA-89xv-5cj4-39m4","title":"A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an...","description":"A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.","status":"published","published":"2026-06-08T12:30:29Z","modified":"2026-06-08T12:30:35Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T15:08:38.78705Z"}],"nvd":[{"id":"CVE-2026-50752","description":"A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could allow interception or modification of traffic traversing the VPN tunnel.","status":"published","published":"2026-06-08T12:16:32.503Z","modified":"2026-07-23T07:10:00.113Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:12:22.73178Z"}]}}