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.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A374
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-055
http://www.securityfocus.com/bid/5874
http://www.iss.net/security_center/static/10253.php
http://marc.info/?l=bugtraq&m=103435279404182&w=2