CVE-2002-0438: Zyxel ZYWALL10

Medium severity, CVSS 5.0. EPSS: 1.8% chance of exploitation in the next 30 days.

ZyXEL ZyWALL 10 before 3.50 allows remote attackers to cause a denial of service via an ARP packet with the firewall's IP address and an incorrect MAC address, which causes the firewall to disable the LAN interface.

Affected products

• Zyxel ZYWALL10: version 3.20_wa0 only; version 3.20_wa1 only; version 3.24_wa0 only; version 3.24_wa1 only; version 3.24_wa2 only; version 3.50_wa1 only

Published 2002-07-26. Last modified 2026-06-16.