CVE-2026-85102: Unauth RCE via Improper Cert Trust Validation in CP Quantum SG
CVE-2026-85102 Published on September 9, 2026
Improper Certificate Validation in Quantum Security Gateway
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.
Known Exploited Vulnerability
This Check Point Multiple Products Improper Certificate Validation Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Check Point Security Gateway and Check Point Spark Firewall using Site to Site VPN or Remote Access VPN contain an improper certificate validation vulnerability which could allow an unauthenticated remote attacker to execute arbitrary code on the Gateway.
The following remediation steps are recommended / required by September 25, 2026: 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). Follow applicab
Vulnerability Analysis
CVE-2026-85102 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors in an automatable fashion. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
Improper Certificate Validation
The software does not validate, or incorrectly validates, a certificate. When a certificate is invalid or malicious, it might allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client. The software might connect to a malicious host while believing it is a trusted host, or the software might be deceived into accepting spoofed data that appears to originate from a trusted host.
Products Associated with CVE-2026-85102
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Affected Versions
checkpoint Quantum Security Gateway:- Version R82.10 with Jumbo Hotfix Take 43 or below is affected.
- Version R82 with Jumbo Hotfix Take 125 or below is affected.
- Version R81.20 with Jumbo Hotfix Take 165 or below is affected.