CVE-2001-0964: Valve Software Half-Life

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

Buffer overflow in client for Half-Life 1.1.0.8 and earlier allows malicious remote servers to execute arbitrary code via a long console command.

Affected products

• Valve Software Half-Life: up to and including 1.1.0.8

Published 2001-09-20. Last modified 2026-06-16.