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Vulnerability record · CVE-2002-0693 · published 10 October 2002

CVE-2002-0693: Microsoft windows 2000 vulnerability

Microsoft · Windows 2000

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.

7.5 CVSS 2.0 High EPSS 31% · top 1.8%
7.5CVSS 2.0 base score
31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
14References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=bugtraq&m=103365849505409&w=2
http://marc.info/?l=bugtraq&m=103419115517344&w=2
http://marc.info/?l=bugtraq&m=103435279404182&w=2
http://www.iss.net/security_center/static/10253.php Vendor Advisory
http://www.securityfocus.com/bid/5874
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-055
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A374
http://marc.info/?l=bugtraq&m=103365849505409&w=2
http://marc.info/?l=bugtraq&m=103419115517344&w=2
http://marc.info/?l=bugtraq&m=103435279404182&w=2
http://www.iss.net/security_center/static/10253.php Vendor Advisory
http://www.securityfocus.com/bid/5874
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-055
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A374

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2002-0693), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.