CVE-2002-0693

NONECVSS 0.0Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 52%
CISA-KEV: Not listedEPSS: 52%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
—
EG Score
0.0(none)
EPSS
98.8%
KEV
Not listed

Published

October 10, 2002

Last Modified

June 16, 2026

References (14)

Data Freshness Timeline

(refreshed 2× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-13 06:07 UTCEPSS rescore
  2. 2026-07-11 08:22 UTCEPSS rescore
  3. 2026-07-04 06:26 UTCEPSS rescore
  4. 2026-07-02 14:00 UTCEPSS rescore
  5. 2026-06-29 14:02 UTCEPSS rescore
  6. 2026-06-28 14:02 UTCEPSS rescore
  7. 2026-06-27 03:04 UTCEPSS rescore
  8. 2026-06-24 14:01 UTCEPSS rescore
  9. 2026-06-23 21:29 UTCEPSS rescore
  10. 2026-06-21 01:56 UTCEPSS rescore
  11. 2026-06-18 17:49 UTCEPSS rescore
  12. 2026-06-18 17:49 UTCEPSS rescore
  13. 2026-06-17 17:49 UTCEPSS rescore
  14. 2026-06-16 17:49 UTCEPSS rescore
  15. 2026-06-12 23:07 UTCEPSS rescore
  16. 2026-06-11 13:55 UTCEPSS rescore
  17. 2026-06-10 22:13 UTCEPSS rescore
  18. 2026-06-10 13:17 UTCEPSS rescore
  19. 2026-06-08 14:13 UTCEPSS rescore
  20. 2026-06-07 15:21 UTCEPSS rescore
  21. 2026-06-06 13:44 UTCEPSS rescore
  22. 2026-06-05 06:07 UTCEPSS rescore
  23. 2026-06-04 13:09 UTCEPSS rescore
  24. 2026-06-02 20:10 UTCEPSS rescore
  25. 2026-06-01 13:48 UTCEPSS rescore
Show 19 more
  1. 2026-05-31 18:48 UTCEG score recompute
  2. 2026-05-31 18:48 UTCGHSA enrichment
  3. 2026-05-31 00:13 UTCEPSS rescore
  4. 2026-05-31 00:13 UTCEPSS rescore
  5. 2026-05-29 13:40 UTCEPSS rescore
  6. 2026-05-28 13:42 UTCEPSS rescore
  7. 2026-05-28 13:42 UTCEPSS rescore
  8. 2026-05-28 13:42 UTCEPSS rescore
  9. 2026-05-28 13:42 UTCEPSS rescore
  10. 2026-05-27 13:37 UTCEPSS rescore
  11. 2026-05-27 13:37 UTCEPSS rescore
  12. 2026-05-26 13:41 UTCEPSS rescore
  13. 2026-05-26 13:41 UTCEPSS rescore
  14. 2026-05-26 13:41 UTCEPSS rescore
  15. 2026-05-24 16:42 UTCEPSS rescore
  16. 2026-05-22 21:15 UTCEPSS rescore
  17. 2026-05-20 22:36 UTCEPSS rescore
  18. 2026-05-18 21:29 UTCEPSS rescore
  19. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-21902✓ verified
    First seen Oct 7, 2002

    Microsoft Windows XP/2000/NT 4.0 - Help Facility ActiveX Control Buffer Overflow

    Open source ↗

Frequently asked(4)

What is CVE-2002-0693?
CVE-2002-0693 is a none vulnerability published on October 10, 2002. 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…
When was CVE-2002-0693 disclosed?
CVE-2002-0693 was first published in the National Vulnerability Database on October 10, 2002, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2002-0693 actively exploited?
CVE-2002-0693 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2002-0693?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2002-0693, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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