CVE-2009-0133
Buffer overflow in Microsoft HTML Help Workshop 4.74 and earlier allows context-dependent attackers to execute arbitrary code via a .hhp…
- 10.0HighCVSS base score
- 67.0%Exploitation in 30 daysEPSS · top 0.7% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 8Public exploitsMetasploit, Nuclei and Exploit-DB
Description
Buffer overflow in Microsoft HTML Help Workshop 4.74 and earlier allows context-dependent attackers to execute arbitrary code via a .hhp file with a long "Index file" field, possibly a related issue to CVE-2006-0564.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module and 7 Exploit-DB entries for it. A reference of the record is tagged as an exploit.
Show the exploits9
Metasploit modules1 module
- HTML Help Workshop 4.74 (hhp Project File) Buffer Overflow (Metasploit module) (opens in a new tab)
exploit/windows/fileformat/hhw_hhp_indexfile_bofRank gooddisclosed 17 Jan 2009
Exploit-DB7 entries
- Microsoft HTML Help Workshop 4.74 - '.hhp' Index Buffer Overflow (Metasploit) (3) (Exploit-DB entry) (opens in a new tab)
EDB-ID 16631local, windowspublished 25 Sept 2010Verified
- Microsoft HTML Help Workshop 4.74 - '.hhp' Local Buffer Overflow (1) (Exploit-DB entry) (opens in a new tab)
EDB-ID 10321local, windowspublished 5 Dec 2009Verified
- Microsoft HTML Workshop 4.74 - Universal Buffer Overflow (Exploit-DB entry) (opens in a new tab)
EDB-ID 7727local, windowspublished 12 Jan 2009Verified
- Microsoft HTML Help Workshop - '.hhp' Local Buffer Overflow (3) (Exploit-DB entry) (opens in a new tab)
EDB-ID 1495local, windowspublished 14 Feb 2006Verified
- Microsoft HTML Help Workshop - '.hhp' Local Buffer Overflow (2) (Exploit-DB entry) (opens in a new tab)
EDB-ID 1490local, windowspublished 11 Feb 2006Verified
- Microsoft HTML Help Workshop - '.hhp' Denial of Service (Exploit-DB entry) (opens in a new tab)
EDB-ID 1488dos, windowspublished 10 Feb 2006Verified
- Microsoft HTML Help Workshop - '.hhp' Local Buffer Overflow (1) (Exploit-DB entry) (opens in a new tab)
EDB-ID 1470local, windowspublished 6 Feb 2006Verified
References tagged exploit1 reference
- 7727 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
Published
- 16 years later
· 16 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 67.0% · top 0.7% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 10.0.
Affected products
n/a
- affected n/a
References
2
- 7727 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 4914 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2009-0142 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2009-0133)Record last updated .