CVE-2002-0693: Microsoft Windows 2000

High severity, CVSS 7.5. EPSS: 31.3% chance of exploitation in the next 30 days.

Buffer overflow in the HTML Help ActiveX Control (hhctrl.ocx) in Microsoft Windows 98, 98 Second Edition, Millennium Edition, NT 4.0, NT 4.0 Terminal Server Edition, Windows 2000, and Windows XP allows remote attackers to execute code via (1) a long parameter to the Alink function, or (2) script containing a long argument to the showHelp function.

Affected products

• Microsoft Windows 2000: any version
• Microsoft Windows 2000 Terminal Services: any version
• Microsoft Windows 98: any version
• Microsoft Windows 98se: any version
• Microsoft Windows Me: any version
• Microsoft Windows Nt: version 4.0 only
• Microsoft Windows XP: any version

Published 2002-10-10. Last modified 2026-06-16.