CVE-2007-6255: Microsoft Windows 2000

High severity, CVSS 9.3. EPSS: 30.1% chance of exploitation in the next 30 days.

Buffer overflow in the Microsoft HeartbeatCtl ActiveX control in HRTBEAT.OCX allows remote attackers to execute arbitrary code via the Host argument to an unspecified method.

Affected products

• Microsoft Windows 2000: affected versions not specified
• Microsoft Windows Server 2003: affected versions not specified
• Microsoft Windows Vista: affected versions not specified
• Microsoft Windows XP: affected versions not specified

Published 2008-04-23. Last modified 2026-06-16.