CVE-2000-0339: Zonelabs Zonealarm

High severity, CVSS 7.5. EPSS: 7.3% chance of exploitation in the next 30 days.

ZoneAlarm 2.1.10 and earlier does not filter UDP packets with a source port of 67, which allows remote attackers to bypass the firewall rules.

Affected products

• Zonelabs Zonealarm: up to and including 2.2.10

Published 2000-04-24. Last modified 2026-06-16.