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Vulnerability record · CVE-2007-0427 · published 23 January 2007

CVE-2007-0427: Microsoft html help workshop vulnerability

Microsoft · Html Help Workshop

Stack-based buffer overflow in Microsoft Help Workshop 4.03.0002 allows user-assisted remote attackers to execute arbitrary code via a help project (.HPJ) file with a long HLP field in the OPTIONS section.

9.3 CVSS 2.0 High EPSS 31% · top 1.8%
9.3CVSS 2.0 base score
31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

Stack-based buffer overflow in Microsoft Help Workshop 4.03.0002 allows user-assisted remote attackers to execute arbitrary code via a help project (.HPJ) file with a long HLP field in the OPTIONS section.

AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

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

References

LinkTags
http://osvdb.org/31899
http://secunia.com/advisories/23862
http://securityreason.com/securityalert/2177
http://www.anspi.pl/~porkythepig/visualization/hpj-x01.cpp Exploit
http://www.securityfocus.com/archive/1/457436/100/0/threaded
http://www.securityfocus.com/bid/22135 Exploit
http://osvdb.org/31899
http://secunia.com/advisories/23862
http://securityreason.com/securityalert/2177
http://www.anspi.pl/~porkythepig/visualization/hpj-x01.cpp Exploit
http://www.securityfocus.com/archive/1/457436/100/0/threaded
http://www.securityfocus.com/bid/22135 Exploit

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Related vulnerabilities

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

10.0CVE-2009-0133Microsoft HTML Help Workshop buffer overflow via long Index file fieldMicrosoft HTML Help Workshop 4.74 and earlier contains a buffer overflow (CWE-119) triggered by a .hhp project file containing an overly long "Index …EPSS 67%analysed9.3CVE-2007-0352Microsoft html help workshop vulnerabilityStack-based buffer overflow in Microsoft Help Workshop 4.03.0002 allows user-assisted remote attackers to execute arbitrary code via a crafted .cnt f…EPSS 37%7.5CVE-2006-0564Microsoft HTML Help Workshop stack buffer overflow via .hhp fileMicrosoft HTML Help Workshop 4.74.8702.0 (and possibly earlier versions, as shipped in the HTML Help 1.4 SDK) has a stack-based buffer overflow when …EPSS 72%analysed

Source: NIST National Vulnerability Database (record CVE-2007-0427), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.