CVE-2006-5420: Kerio Winroute Firewall

Medium severity, CVSS 5.0. EPSS: 2.6% chance of exploitation in the next 30 days.

Kerio WinRoute Firewall 6.2.2 and earlier allows remote attackers to cause a denial of service (crash) via malformed DNS responses.

Affected products

• Kerio Winroute Firewall: up to and including 6.2.2; version 5.0.1 only; version 5.0.2 only; version 5.0.3 only; version 5.0.4 only; version 5.0.5 only; …

Published 2006-10-20. Last modified 2026-06-16.