CVE-2002-0693

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

31.3% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2002-10-10 04:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 21:57 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 31.3% in the next 30 days (EPSS).
• Severity: 7.5 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2002-10-10 04:00 UTC

Last modified

2026-06-16 21:57 UTC

Exploit probability

31.3% · EPSS, next 30 days

Record status

Modified

Affected

• Microsoft Windows 2000
• Microsoft Windows 2000 Terminal Services
• Microsoft Windows 98
• Microsoft Windows 98se
• Microsoft Windows Me
• Microsoft Windows Nt 4.0
• Microsoft Windows Xp

Attack profile CVSS 2.0 · 7.5

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2002-0693.md and follow it. Check whether this project is affected by CVE-2002-0693. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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