{"id":"CVE-2002-0823","url":"https://www.cyber-defence.io/tools/cve/CVE-2002-0823","generatedAt":"2026-10-27T20:51:16.564Z","title":"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.","description":"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.","published":"2002-08-12T04:00:00.000Z","lastModified":"2026-06-16T21:58:12.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":7.5,"severity":"HIGH","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P"},"cwe":[],"affected":["microsoft/windows help","microsoft/windows 2000"],"epss":{"score":0.26175,"percentile":0.97982,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2002-05-27","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":21485,"kind":"exploit","title":"Microsoft Windows 95/98/2000/NT 4.0 - WinHlp Item Buffer Overflow","url":"https://www.exploit-db.com/exploits/21485","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/windows/remote/21485.txt","file":"exploits/windows/remote/21485.txt","published":"2002-05-27","added":"2002-05-27","updated":"2012-09-23","author":"Next Generation Security","type":"remote","platform":"windows","port":null,"verified":true,"codes":["CVE-2002-0823","OSVDB-2991"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.securityfocus.com/bid/4857/info"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 26.2%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://marc.info/?l=bugtraq&m=102822806329440&w=2","source":"cve@mitre.org"},{"url":"http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3Bq293338","source":"cve@mitre.org"},{"url":"http://www.iss.net/security_center/static/9746.php","source":"cve@mitre.org"},{"url":"http://www.osvdb.org/2991","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/4857","source":"cve@mitre.org"},{"url":"http://marc.info/?l=bugtraq&m=102822806329440&w=2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3Bq293338","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.iss.net/security_center/static/9746.php","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.osvdb.org/2991","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/4857","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2002-0823","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}