CVE-2002-0823

NONECVSS 0.0Weaponized

0.0

Buffer overflow in Winhlp32.exe allows remote attackers to execute arbitrary code via an HTML document that calls the HTML Help ActiveX control (HHCtrl.ocx) with a long pathname in the Item parameter.

CVSS v3: —
EG Score: —
EPSS: 98.5%
KEV: Not listed

Published

August 12, 2002

Last Modified

April 16, 2026

References (10)

cve@mitrehttp://marc.info/?l=bugtraq&m=102822806329440&w=2
cve@mitrehttp://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3Bq293338
cve@mitrehttp://www.iss.net/security_center/static/9746.php
cve@mitrehttp://www.osvdb.org/2991
cve@mitrehttp://www.securityfocus.com/bid/4857
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=102822806329440&w=2
af854a3a-2127-422b-91ae-364da2661108http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3Bq293338
af854a3a-2127-422b-91ae-364da2661108http://www.iss.net/security_center/static/9746.php
af854a3a-2127-422b-91ae-364da2661108http://www.osvdb.org/2991
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/4857

Data Freshness Timeline

(refreshed 10× in last 7d / 13× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-20 22:36 UTCepss_batch
2026-05-18 21:29 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

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-21485✓ verified
First seen May 27, 2002
Microsoft Windows 95/98/2000/NT 4.0 - WinHlp Item Buffer Overflow
Open source ↗

Frequently asked(4)

What is CVE-2002-0823?

CVE-2002-0823 is a none vulnerability published on August 12, 2002. Buffer overflow in Winhlp32.exe allows remote attackers to execute arbitrary code via an HTML document that calls the HTML Help ActiveX control (HHCtrl.ocx) with a long pathname in the Item parameter.

When was CVE-2002-0823 disclosed?

CVE-2002-0823 was first published in the National Vulnerability Database on August 12, 2002, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2002-0823 actively exploited?

CVE-2002-0823 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2002-0823?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2002-0823, 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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CVE-2002-0823

📅 Published

🔄 Last Modified

🔗 References (10)