CVE-2002-1071: Zyxel Prestige

Medium severity, CVSS 5.0. EPSS: 3.3% chance of exploitation in the next 30 days.

ZyXEL Prestige 642R allows remote attackers to cause a denial of service in the Telnet, FTP, and DHCP services (crash) via a TCP packet with both the SYN and ACK flags set.

Affected products

• Zyxel Prestige: version 310 only; version 642r only

Published 2002-10-04. Last modified 2026-06-16.