CVE-2008-1255: Zyxel P-660hw

High severity, CVSS 10.0. EPSS: 3.9% chance of exploitation in the next 30 days.

The ZyXEL P-660HW series router maintains authentication state by IP address, which allows remote attackers to bypass authentication by establishing a session from a source IP address of a previously authenticated user.

Affected products

• Zyxel P-660hw: any version

Published 2008-03-10. Last modified 2026-06-16.