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CVE-2026-85102 — Improper Certificate Validation in Quantum Security Gateway

CVE-2026-85102 · Quantum Security Gateway · CVSS 9.8 · KEV

In brief

Severity · CVSS
Critical9.8CVSS 3.1, Critical
EPSS
8%
CISA KEV
Known exploited, listed since 22 Sept 2026
Published · Modified
·
Last verified

Summary

Improper certificate trust validation during VPN negotiation in Check Point Quantum Security Gateway may allow an unauthenticated remote attacker to execute arbitrary code on the Gateway.

Weakness: CWE-295

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.

4 branches with a published fixed release

Check Point Quantum Security Gateway

Source: sk1000117CVE-2026-85102

  1. R82.10
    Affected versionsR82.10 GA – R82.10 JHF Take 43
    First fixed releaseR82.10 JHF Take 44
    Current maintenanceTake 45Latest known on 23 Oct 2026; Check Point's notes are not read sinceCheck Point JHF catalog
    SupportSupportedSupport ends 30 Jun 2030Check Point life cycle policy
  2. R82
    Affected versionsR82 GA – R82 JHF Take 125
    First fixed releaseR82 JHF Take 126
    Current maintenanceTake 127Latest known on 23 Oct 2026; Check Point's notes are not read sinceCheck Point JHF catalog
    SupportSupportedSupport ends 30 Apr 2029Check Point life cycle policy
  3. R81.20
    Affected versionsR81.20 GA – R81.20 JHF Take 165
    First fixed releaseR81.20 JHF Take 166
    Current maintenanceTake 170Latest known on 23 Oct 2026; Check Point's notes are not read sinceCheck 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 releaseR81.10 JHF Take 190
    Current maintenanceLast available TakeTake 192Latest known on 23 Oct 2026; Check Point's notes are not read sinceNo longer supported by Check PointCheck Point JHF catalog
    SupportEnd of lifeSupport ends 31 Mar 2026Check Point life cycle policy

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

Remediation

Fix available

Vendor fix

  • Quantum Security Gateway R82.10R82.10 JHF Take 44

    Take 44 is the first maintenance release containing the fix. The latest maintenance release known for this branch is Take 45, as of 23 Oct 2026: Check Point's notes are not read since then, a newer Take may exist.

  • Quantum Security Gateway R82R82 JHF Take 126

    Take 126 is the first maintenance release containing the fix. The latest maintenance release known for this branch is Take 127, as of 23 Oct 2026: Check Point's notes are not read since then, a newer Take may exist.

  • Quantum Security Gateway R81.20R81.20 JHF Take 166

    Take 166 is the first maintenance release containing the fix. The latest maintenance release known for this branch is Take 170, as of 23 Oct 2026: Check Point's notes are not read since then, a newer Take may exist.

  • Quantum Security Gateway R81.10R81.10 JHF Take 190

    Take 190 is the first maintenance release containing the fix. Last available Take: Take 192. This branch is no longer supported by Check Point.

Install your branch's current maintenance release. A branch Check Point no longer supports should move to a supported release.

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

SourceCheck Point sk1000117

CISA KEV required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes).

Full CISA action

Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CISA due date:

SourceCISA KEV

CERT-FR recommendation

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

SourceCERTFR-2026-AVI-1152

Last verified 1 Oct 2026 at 09:31 UTC

Known exploitation

Added to CISA KEV on 22 Sept 2026

Federal remediation due date: 25 Sept 2026

The CISA required action is shown under Remediation.

8% probability of exploitation in the next 30 days (percentile 94%).

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

CERT-FR

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

Advisory (AVI)CERTFR-2026-AVI-1152Published 10 Sept 2026

Multiple vulnerabilities in Check Point products

Remote arbitrary code executionSecurity policy bypass

Summary

Multiple vulnerabilities have been discovered in Check Point products. They allow an attacker to cause remote arbitrary code execution and a security policy bypass.

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. Published by the source
  2. Added to CISA KEV
  3. Source record last modified
  4. CISA remediation due date
  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 sk1000117

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.

  • CVE-2026-50751User Authentication Bypass in VPN Remote Access and Mobile AccessCriticalKEVRansomware
  • CVE-2024-24919Information disclosureHighKEVRansomware

All Quantum Security Gateway vulnerabilitiesAll Check Point vulnerabilities