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CriticalKEVRansomware

CVE-2026-50751 — User Authentication Bypass in VPN Remote Access and Mobile Access

CVE-2026-50751 · Quantum Security Gateway · CVSS 9.3 · KEV

In brief

Severity · CVSS
Critical9.3CVSS 3.1, Critical
EPSS
6%
CISA KEV
Known exploited, listed since 8 Jun 2026
Published · Modified
·
Last verified

Summary

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

Title, description and the vendor's statements are quoted from the CVE record; a vendor's advisory is summarised in Patcharo's words, with a link.

Affected and fixed versions

Per product and release branch, as the vendor's CVE record and official advisory state them. A fixed release is shown only when a document names it: the vendor's, or CERT-FR's for Check Point, with its source.

9 branches without a precise fixed release

No precise fixed release is published in the sources Patcharo follows.

Check Point Quantum Security Gateway

Source: CVE-2026-50751

  1. R82.10
    Affected versionsR82.10 GA – R82.10 JHF Take 19
    First fixed releaseNot published in the sources followed
    Current maintenanceTake 45Latest known on 23 Oct 2026; Check Point's notes are not read sinceNot stated as a fix for this CVECheck Point JHF catalog
    SupportSupportedSupport ends 30 Jun 2030Check Point life cycle policy
  2. R82
    Affected versionsR82 GA – R82 JHF Take 103
    First fixed releaseNot published in the sources followed
    Current maintenanceTake 127Latest known on 23 Oct 2026; Check Point's notes are not read sinceNot stated as a fix for this CVECheck Point JHF catalog
    SupportSupportedSupport ends 30 Apr 2029Check Point life cycle policy
  3. R81.20
    Affected versionsR81.20 GA – R81.20 JHF Take 141
    First fixed releaseNot published in the sources followed
    Current maintenanceTake 170Latest known on 23 Oct 2026; Check Point's notes are not read sinceNot stated as a fix for this CVECheck Point JHF catalog
    SupportApproaching end of supportSupport ends 31 May 2027Check Point life cycle policy
  4. R81.10
    Affected versionsListed as affected, releases not specified
    First fixed releaseNot published in the sources followed
    Current maintenanceLast available TakeTake 192Latest known on 23 Oct 2026; Check Point's notes are not read sinceNot stated as a fix for this CVENo longer supported by Check PointCheck Point JHF catalog
    SupportEnd of lifeSupport ends 31 Mar 2026Check Point life cycle policy
  5. R81
    Affected versionsListed as affected, releases not specified
    First fixed releaseNot published in the sources followed
    Current maintenanceNot published
    SupportEnd of lifeSupport ends 31 Oct 2024Check Point life cycle policy
  6. R80.40
    Affected versionsListed as affected, releases not specified
    First fixed releaseNot published in the sources followed
    Current maintenanceNot published
    SupportEnd of lifeSupport ends 30 Apr 2024Check Point life cycle policy

Check Point recommended release for all deployments: R82.10sk95746

No precise fixed release is published for this product in the sources Patcharo follows.

Check Point Spark Firewalls

Source: CVE-2026-50751

  1. R82.00
    Affected versionsAll releases of the branch
    First fixed releaseNot published in the sources followed
  2. R81.10
    Affected versionsAll releases of the branch
    First fixed releaseNot published in the sources followed
  3. R80.20
    Affected versionsAll releases of the branch
    First fixed releaseNot published in the sources followed

No precise fixed release is published for this product in the sources Patcharo follows.

Remediation

Vendor guidance

CISA 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.

CISA due date:

SourceCISA KEV

CERT-FR recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

SourceCERTFR-2026-AVI-0711

Vendor advisory

The vendor has published an advisory for this CVE: check it for fixed releases and mitigations.

SourceCheck Point sk185033

Last verified 1 Oct 2026 at 09:31 UTC

Known exploitation

Added to CISA KEV on 8 Jun 2026

Federal remediation due date: 11 Jun 2026

Known use in ransomware campaigns

The CISA required action is shown under Remediation.

6% probability of exploitation in the next 30 days (percentile 93%).

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

CERT-FR

1 document of the French national CERT (ANSSI) references this CVE.

Advisory (AVI)CERTFR-2026-AVI-0711Published 9 Jun 2026

Multiple vulnerabilities in Check Point VPNs

Security policy bypass

Summary

Multiple vulnerabilities have been discovered in Check Point VPNs. They allow an attacker to cause a security policy bypass. Check Point indicates that the CVE-2026-50751 vulnerability is actively exploited. The CVE-2026-50751 vulnerability affects instances with the IKEv1 protocol enabled. The vendor also provides workarounds and indicators of compromise. These have not been qualified by CERT-FR.

Recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

Official document on cert.ssi.gouv.frread by Patcharo 28 Sept 2026 at 20:03 UTCMachine translation of the French text published by CERT-FR; a text whose translation did not pass Patcharo's checks stays in French. Identifiers, versions and links are copied unchanged.

Timeline

  1. Added to CISA KEV
  2. Published by the source
  3. CISA remediation due date
  4. Source record last modified
  5. EPSS score computed
  6. Last verified by Patcharo

Official sources

References

Vendor advisory

Check Point · CISA Known Exploited Vulnerabilities · NVD · FIRST EPSS · Check Point sk185033

How Patcharo reads this

Affected and fixed releases come from the vendor's structured statements and are matched against exact versions; CVSS from NVD, exploitation from CISA KEV and the vendor's own advisory, probability from FIRST EPSS. Missing data stays Unknown and never becomes Not affected.

Read the methodologyRead the guide: Check Point releases, Jumbo Hotfix Accumulators and Take numbers explained

Related vulnerabilities

Other records affecting the same products, newest first.

All Quantum Security Gateway vulnerabilitiesAll Check Point vulnerabilities