{"cve":{"cve_id":"CVE-2026-50751","is_kev":true,"kev_date_added":"2026-06-08","kev_vendor_project":"Check Point","kev_product":"Security Gateway","kev_vulnerability_name":"Check Point Security Gateway Improper Authentication Vulnerability","kev_short_description":"Check Point Security Gateway contains an improper authentication vulnerability in IKEv1 key exchange that could allow an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password.","kev_required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","kev_due_date":"2026-06-11","kev_known_ransomware":true,"kev_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","kev_cwes":["CWE-287"],"epss_score":0.71051,"epss_percentile":0.99321,"epss_as_of":"2026-06-23","description":"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.","published_at":"2026-06-08T11:07:15.746000Z","last_modified_at":null,"cvss_v3_score":9.3,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-287"],"nvd_references":["https://support.checkpoint.com/results/sk/sk185033"],"vuln_status":null,"trending_score":0.6199615873998298,"is_trending":true,"has_trended":true,"trended_number_one":false,"trending_peak_score":0.6199615873998298,"trending_peak_rank":11,"started_trending_at":"2026-06-29T02:30:27.366045Z","trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-29T02:30:27.550645Z"},"effective_severity":"CRITICAL","badges":["kev","ransomware","poc","trending","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"C","value_label":"Changed"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"L","value_label":"Low"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"checkpoint","vendor_name":"checkpoint","product_slug":"quantum-security-gateway","product_name":"Quantum Security Gateway","version_start":"R82.10 with Jumbo Hotfix Take 19 or below","version_start_inclusive":true,"version_end":"R82.10 with Jumbo Hotfix Take 19 or below","version_end_inclusive":true,"cpe23_uri":"cve5:checkpoint:quantum-security-gateway:R82.10 with Jumbo Hotfix Take 19 or below:R82.10 with Jumbo Hotfix Take 19 or below"},{"vendor_slug":"checkpoint","vendor_name":"checkpoint","product_slug":"quantum-security-gateway","product_name":"Quantum Security Gateway","version_start":"R82 with Jumbo Hotfix Take 103 or below","version_start_inclusive":true,"version_end":"R82 with Jumbo Hotfix Take 103 or below","version_end_inclusive":true,"cpe23_uri":"cve5:checkpoint:quantum-security-gateway:R82 with Jumbo Hotfix Take 103 or below:R82 with Jumbo Hotfix Take 103 or below"},{"vendor_slug":"checkpoint","vendor_name":"checkpoint","product_slug":"quantum-security-gateway","product_name":"Quantum Security Gateway","version_start":"R81.20 with Jumbo Hotfix Take 141 or below","version_start_inclusive":true,"version_end":"R81.20 with Jumbo Hotfix Take 141 or below","version_end_inclusive":true,"cpe23_uri":"cve5:checkpoint:quantum-security-gateway:R81.20 with Jumbo Hotfix Take 141 or below:R81.20 with Jumbo Hotfix Take 141 or below"},{"vendor_slug":"checkpoint","vendor_name":"checkpoint","product_slug":"quantum-security-gateway","product_name":"Quantum Security Gateway","version_start":"R81.10, R81, and R80.40","version_start_inclusive":true,"version_end":"R81.10, R81, and R80.40","version_end_inclusive":true,"cpe23_uri":"cve5:checkpoint:quantum-security-gateway:R81.10, R81, and R80.40:R81.10, R81, and R80.40"},{"vendor_slug":"checkpoint","vendor_name":"checkpoint","product_slug":"spark-firewalls","product_name":"Spark Firewalls","version_start":"R80.20.X, R81.10.X, and R82.00.X","version_start_inclusive":true,"version_end":"R80.20.X, R81.10.X, and R82.00.X","version_end_inclusive":true,"cpe23_uri":"cve5:checkpoint:spark-firewalls:R80.20.X, R81.10.X, and R82.00.X:R80.20.X, R81.10.X, and R82.00.X"}],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-50751.yaml","title":"Check Point IKEv1 Remote-Access VPN - Certificate Authentication Bypass","author":"watchTowr,DhiyaneshDk","disclosed_at":null}],"news":[],"references":[{"url":"https://support.checkpoint.com/results/sk/sk185033","source_type":"MISC","tags":[]}],"timeline":[{"type":"cisa_reported","at":"2026-06-08T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"published","at":"2026-06-08T11:07:15.746000Z","label":"CVE published","source":null},{"type":"poc_available","at":"2026-06-24T00:29:48.638073Z","label":"Public PoC available","source":"nuclei"},{"type":"cvss_changed","at":"2026-06-28T17:55:22.518073Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:55:22.518073Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:55:22.518073Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"started_trending","at":"2026-06-29T02:30:27.366045Z","label":"Started trending","source":null}]}