CVE-2026-85102: Check Point Multiple Products Improper Certificate Validation Vulnerability

What it is

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

Treat this as urgent. Identify every affected system, starting with anything internet-facing, and apply the vendor fix or mitigation within days. If you cannot patch quickly, isolate or disable the affected service and watch for signs of compromise.

Priority

Act now: Patch or mitigate internet-facing systems within days.

Severity (CVSS)

9.8 critical

CISA assessment (SSVC)

actively exploited; attackers can automate it at scale; total control of the affected system

Exploit probability (EPSS, 30 days)

7.5%, higher than 94% of all CVEs

Added to CISA KEV

22 September 2026

CISA fix-by date

25 September 2026 (US federal agencies; a sensible deadline for everyone)

Ransomware use

Not known

Weakness

CWE-295

References

• NIST NVD entry
• CISA KEV entry
• support.checkpoint.com/results/sk/sk1000117
• blog.checkpoint.com/security/security-advisory-action-required-active-exploitati
• www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-85102

Sources: CISA Known Exploited Vulnerabilities · FIRST Exploit Prediction Scoring System (EPSS) · NIST National Vulnerability Database · CISA Vulnrichment (SSVC), via the CVE Program. This product uses data from the NVD API but is not endorsed or certified by the NVD. Summaries are machine-written from CISA’s description; treat the vendor’s advisory as the authority for fixes.