Known exploited vulnerability
CVE-2026-50751
The short answer
CVE-2026-50751 affects checkpoint Quantum Security Gateway and is rated critical (CVSS 9.3). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-06-08: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
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.
Weakness: CWE-287.
Severity
9.3 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Exploited (CISA KEV)
Yes, since Jun 8, 2026
Federal due date Jun 11, 2026
EPSS, next 30 days
85%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- Low
- Availability impact
- None
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
Quantum Security Gateway, Spark Firewalls. NVD's record lists the exact affected versions.
References
- support.checkpoint.com/results/sk/sk185033 MitigationPatchVendor Advisory
- blog.checkpoint.com/security/check-point-releases-important-hotfix-for-vulnerabilities-in-deprecated-ikev1-vpn-protocol/ Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-50751 US Government Resource
Questions
Is CVE-2026-50751 being exploited?
Yes. CISA added CVE-2026-50751 to its Known Exploited Vulnerabilities catalog on 2026-06-08, with a federal remediation due date of 2026-06-11. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2026-50751?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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