Unauthenticated VPN access via certificate-validation logic flaw
Published Jun 8, 2026 · Updated Jun 8, 2026
Authentication bypass in Check Point VPN gateways using deprecated IKEv1 allows remote attackers to establish sessions without passwords. The Remote Access and Mobile Access certificate-validation flow permits VPN session establishment without completing valid password authentication. Exposure requires an affected gateway configured for IKEv1 Remote Access or Mobile Access; a successful session provides VPN access, while internal-resource access requires further activity.
Summary
What happened
Authentication bypass in Check Point VPN gateways using deprecated IKEv1 allows remote attackers to establish sessions without passwords. The Remote Access and Mobile Access certificate-validation flow permits VPN session establishment without completing valid password authentication. Exposure requires an affected gateway configured for IKEv1 Remote Access or Mobile Access; a successful session provides VPN access, while internal-resource access requires further activity.
The record
- CVE
- CVE-2026-50751
- Published
- Jun 8, 2026
- Updated
- Jun 8, 2026
- Vendor
- Check Point Software Technologies Ltd.
- Product
- Quantum Security Gateway
- Classifications
- CWE-287, T1133
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 7, 2026Exploitation reportedCheck Point observed active exploitation
- Jun 8, 2026Exploitation reportedCISA Known Exploited Vulnerabilities catalog entry
- Jun 8, 2026CVE publishedPublication date reported by the CVE source.
- Jun 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=R81.10, R81, and R80.40
- Affected versionversion=R81.20 with Jumbo Hotfix Take 141 or below
- Affected versionversion=R82.10 with Jumbo Hotfix Take 19 or below
- Affected versionversion=R82 with Jumbo Hotfix Take 103 or below
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- CISA Known Exploited Vulnerabilities catalog entryknown exploited catalog
- Check Point observed active exploitationreported exploitation
- Qilin ransomware affiliate post-compromise activityransomware
Technologies
Your stack
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Your stack
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