CVE-2001-1135: Zyxel Prestige

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

ZyXEL Prestige 642R and 642R-I routers do not filter the routers' Telnet and FTP ports on the external WAN interface from inside access, allowing someone on an internal computer to reconfigure the router, if the password is known.

Affected products

• Zyxel Prestige: version 642r only

Published 2001-08-14. Last modified 2026-06-16.