CVE-2000-0969: Valve Software Half-Life Dedicated Server

High severity, CVSS 10.0. EPSS: 3.5% chance of exploitation in the next 30 days.

Format string vulnerability in Half Life dedicated server build 3104 and earlier allows remote attackers to execute arbitrary commands by injecting format strings into the changelevel command, via the system console or rcon.

Affected products

• Valve Software Half-Life Dedicated Server: version 3.1.3 only

Published 2000-12-19. Last modified 2026-09-23.