Check Point Multiple Products Improper Certificate Validation Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-09-22
• EPSS: 54% chance of exploitation in the next 30 days (higher than 99% of CVEs)
• Critical severity: CVSS 9.8

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 25 Sep 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 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.

• Patch on support.checkpoint.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• support.checkpoint.com/results/sk/sk1000117MitigationPatchVendor Advisory
• blog.checkpoint.com/security/security-advisory-action-required-active-exploitation-of-c…Vendor Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource