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Fencer Vulns
high 7.5

CVE-2006-0564 in the critical feed json

Stack-based buffer overflow in Microsoft HTML Help Workshop 4.74.8702.0, and possibly earlier versions, and as included in the Microsoft HT…

published 2006-02-06 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-0571

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
71.7%
EPSS 71.7% chance of exploitation in 30 days, percentile 99.4%
public exploits
10
Metasploit, Exploit-DB

Summary

Stack-based buffer overflow in Microsoft HTML Help Workshop 4.74.8702.0, and possibly earlier versions, and as included in the Microsoft HTML Help 1.4 SDK, allows context-dependent attackers to execute arbitrary code via a .hhp file with a long Contents file field.

Timeline

  1. First public exploit (Metasploit exploit/windows/fileformat/hhw_hhp_compiledfile_bof)
  2. Published

Exploit prediction

71.70% chance of exploitation in the next 30 days, higher than 99.4% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/windows/fileformat/hhw_hhp_compiledfile_bof HTML Help Workshop 4.74 (hhp Project File) Buffer Overflow metasploit exploit, good rank, 2006-02-06
  • Metasploit exploit/windows/fileformat/hhw_hhp_contentfile_bof HTML Help Workshop 4.74 (hhp Project File) Buffer Overflow metasploit exploit, good rank, 2006-02-06
  • EDB-16683 Microsoft HTML Help Workshop 4.74 - '.hhp' compiled Buffer Overflow (Metasploit) (4) local, 2010-09-25
  • EDB-16648 Microsoft HTML Help Workshop 4.74 - '.hhp' Cotent Buffer Overflow (Metasploit) (2) local, 2010-09-25
  • EDB-10321 Microsoft HTML Help Workshop 4.74 - '.hhp' Local Buffer Overflow (1) local, 2009-12-05
  • EDB-7727 Microsoft HTML Workshop 4.74 - Universal Buffer Overflow local, 2009-01-12
  • EDB-1495 Microsoft HTML Help Workshop - '.hhp' Local Buffer Overflow (3) local, 2006-02-14
  • EDB-1490 Microsoft HTML Help Workshop - '.hhp' Local Buffer Overflow (2) local, 2006-02-11
  • EDB-1488 Microsoft HTML Help Workshop - '.hhp' Denial of Service dos, 2006-02-10
  • EDB-1470 Microsoft HTML Help Workshop - '.hhp' Local Buffer Overflow (1) local, 2006-02-06

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

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.