CVE-2026-91843: Check Point Quantum Security Management

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

A stack overflow during the unauthenticated login process may allow an attacker to run arbitrary code remotely with root privileges.

Affected products

• Check Point Quantum Security Management: up to and including R82.10; up to and including R81.20; up to and including R81.10; version R81 (EOS) only; version R80.40 (EOS) only; version R80.30 (EOS) only; …

Published 2026-09-16. Last modified 2026-09-18.