CVE-2005-1504: Gamespy Cd-Key Validation System

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

GameSpy SDK CD-Key Validation Toolkit, as used by many online games, allows remote attackers to bypass the CD key validation by sending a spoofed \disc\ command, which tells the server the CD key is no longer in use.

Affected products

• Gamespy Cd-Key Validation System: any version

Published 2005-05-11. Last modified 2026-06-16.