Check Point · Multiple Products
CVE-2026-85102
Improper Certificate Validation in Quantum Security Gateway
What it is
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.
CISA: 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.
What to do
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 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.
Deadline for US federal agencies: September 25, 2026
- Added to the CISA list
- September 22, 2026
- Published
- September 9, 2026
- Severity
- Critical 9.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 54% in the top 1.0% of all known vulnerabilities
- Weakness
- CWE-295
- More details
- NVD · CVE.org · CISA
All references (1)
More exploited flaws from Check Point
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Sep 22, 2026 | Path Traversal | Multiple Products | Critical 9.8 | 92% |
| Jul 22, 2026 | Improper Authentication | SmartConsole | Critical 9.3 | 3.5% |
| Jun 8, 2026 | Improper Authentication | Security Gateway | Critical 9.3 | 85% |
| May 30, 2024 | Information Disclosure | Quantum Security Gateways | High 8.6 | >99.9% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.