CVE-2000-0804: Check Point Firewall-1

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

Check Point VPN-1/FireWall-1 4.1 and earlier allows remote attackers to bypass the directionality check via fragmented TCP connection requests or reopening closed TCP connection requests, aka "One-way Connection Enforcement Bypass."

Affected products

• Check Point Firewall-1: version 3.0 only; version 4.0 only; version 4.1 only

Published 2000-11-14. Last modified 2026-06-16.