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Actively exploitedKnown ransomware use

CVE-2026-50751 Check Point Security Gateway Improper Authentication Vulnerability

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.

From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.

Our Assessment

Should You Worry?

Patch nowCybergen assessment
  • CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 8 Jun 2026.
  • CISA lists it as known to be used in ransomware campaigns.
  • Rated Critical severity (CVSS 9.3, scored by CISA).
  • This product type is often exposed to the internet, which is where attackers scan for it first.
  • It has been in the catalogue for 151 days. Systems still unpatched now have almost certainly been scanned for it.
The Vulnerability

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.

Affected Versions

ProductVersions
checkpoint Quantum Security GatewayR82.10 with Jumbo Hotfix Take 19 or below
R82 with Jumbo Hotfix Take 103 or below
R81.20 with Jumbo Hotfix Take 141 or below
R81.10, R81, and R80.40
checkpoint Spark FirewallsR80.20.X, R81.10.X, and R82.00.X

From the public CVE record, as supplied by the vendor. Always confirm against the vendor advisory.

From Watch to Action

What To Do Now

  1. 1

    Find it

    Search your asset inventory and external attack surface for Check Point Security Gateway. Include cloud images, appliances and anything a supplier runs for you.

    Attack Surface Management
  2. 2

    Fix it

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

    Vulnerability Management
  3. 3

    Hunt for compromise

    If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.

    Incident Response
  4. 4

    Prove it is fixed

    Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.

    Penetration Testing

Vendor Advisories

Regulation

The Compliance Clock

Cyber EssentialsRated critical, so if it affects devices in your Cyber Essentials scope, the update must be installed within 14 days of the vendor releasing it.NIS2If exploitation causes a significant incident, essential and important entities owe their CSIRT an early warning within 24 hours and a notification within 72 hours.DORAFinancial entities must classify ICT incidents and send an initial notification for a major incident within strict deadlines, with exploited flaws a common cause.US federal (BOD 22-01)Federal civilian agencies had until 11 Jun 2026 to remediate. A sensible benchmark for everyone else.

General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.

Stay Ahead

More Exploited Check Point Flaws

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CVE-2026-93616Check Point Multiple Products Path Traversal VulnerabilityAdded 22 Sep 2026CVE-2026-85102Check Point Multiple Products Improper Certificate Validation VulnerabilityAdded 22 Sep 2026CVE-2026-16232Check Point SmartConsole Improper Authentication VulnerabilityAdded 22 Jul 2026CVE-2024-24919 · RansomwareCheck Point Quantum Security Gateways Information Disclosure VulnerabilityAdded 30 May 2024

All 5 exploited Check Point vulnerabilities

Not Sure If You Are Exposed?

Our attack surface and vulnerability teams can check your internet-facing estate for CVE-2026-50751 and every other exploited flaw on the list.

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Evidence

Sources

  1. CISA Known Exploited Vulnerabilities catalogue
  2. NVD: CVE-2026-50751
  3. CVE record: CVE-2026-50751
  4. FIRST EPSS
  5. blog.checkpoint.com/security/check-point-releases-important-hotfix-for-vulnerabilities-in-deprecated
  6. support.checkpoint.com/results/sk/sk185033?_gl=1*1wqeqhc*_gcl_au*MTI1MzE5MjI2LjE3ODA5MzQ1NTM.
  7. support.checkpoint.com/results/sk/sk185033