CVE-2009-3129
High 7.8 Exploited in the wild (KEV)
Confirmed active exploitation — CISA KEV catalog
- Name
- Microsoft Excel Featheader Record Memory Corruption Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
Microsoft Office Excel 2002 SP3, 2003 SP3, and 2007 SP1 and SP2; Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; Office Excel Viewer 2003 SP3; Office Excel Viewer SP1 and SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allows remote attackers to execute arbitrary code via a spreadsheet with a FEATHEADER record containing an invalid cbHdrData size element that affects a pointer offset, aka "Excel Featheader Record Memory Corruption Vulnerability."
Metrics
- CVSS 3.1
-
7.8 (HIGH)
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 84% (percentile: 100) as of 1 November 2026
- CWE
- CWE-787
Affected products
microsoft: excel; microsoft: excel viewer; microsoft: office; microsoft: open xml file format converter
References
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-0… PatchVendor Advisory
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-0… PatchVendor Advisory
- http://www.exploit-db.com/exploits/14706 ExploitThird Party AdvisoryVDB Entry
- http://www.exploit-db.com/exploits/14706 ExploitThird Party AdvisoryVDB Entry
- http://archives.neohapsis.com/archives/bugtraq/2009-11/0080.html Broken Link
- http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=832 Broken Link
- http://osvdb.org/59860 Broken Link
- http://www.securityfocus.com/bid/36945 Broken LinkThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id?1023157 Broken LinkThird Party AdvisoryVDB Entry
- http://www.us-cert.gov/cas/techalerts/TA09-314A.html Third Party AdvisoryUS Government Resource