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Fencer Vulns
critical 9.3

CVE-2007-0427 in the critical feed json

Stack-based buffer overflow in Microsoft Help Workshop 4.03.0002 allows user-assisted remote attackers to execute arbitrary code via a help…

published 2007-01-23 19 y ago modified 2026-06-16 4 mo ago also EUVD-2007-0427

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
31.4%
EPSS 31.4% chance of exploitation in 30 days, percentile 98%
public exploits
2
Exploit-DB

Summary

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.

Timeline

  1. First public exploit (EDB-3149)
  2. Published

Exploit prediction

31.37% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-3159 Microsoft Help Workshop 4.03.0002 - '.HPJ' Local Buffer Overflow local, 2007-01-19
  • EDB-3149 Microsoft Help Workshop 4.03.0002 - '.cnt' Local Buffer Overflow local, 2007-01-17
  • securityfocus.com http://www.securityfocus.com/bid/22135 referenced PoC, tagged "exploit" by a source, unverified
  • anspi.pl http://www.anspi.pl/~porkythepig/visualization/hpj-x01.cpp referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.