CVE-2002-0693

Buffer overflow in the HTML Help ActiveX Control (hhctrl.ocx) in Microsoft Windows 98, 98 Second...

7.5 HighPublic exploit

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.

Exploit likelihood

31.3%Down 16.8 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2002-0693
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Updated: 2026-11-02

CVE List No score

Record: CVE-2002-0693
Updated: 2026-11-02

EUVDEUVD-2002-0685 No score

Record: EUVD-2002-0685
Updated: 2026-11-03

GitHub AdvisoriesGHSA-vc6x-jx7x-qrfq No score

Buffer overflow in the HTML Help ActiveX Control (hhctrl.ocx) in Microsoft Windows 98, 98 Second...

Record: GHSA-vc6x-jx7x-qrfq
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Microsoft Windows XP/2000/NT 4.0 - Help Facility ActiveX Control Buffer Overflow	2002-10-07

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2002-0693 is a high vulnerability (CVSS 7.5) in Microsoft Windows 2000, published October 5, 2002. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 31.3%, the 98th percentile. No source names a fixed version.