CVE-2009-3129

KEVMicrosoft Excel Featheader Record Memory Corruption Vulnerability

Description

Microsoft Office Excel 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.

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."

CVSS 3.1 vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

PublishedNov 11, 2009

Last modifiedJun 16, 2026

Added to KEVMar 3, 2022

Remediation dueMar 24, 2022

References

archives.neohapsis.com/archives/bugtraq/2009-11/0080.htmlBroken Link
labs.idefense.com/intelligence/vulnerabilities/display.php?id=832Broken Link
osvdb.org/59860Broken Link
exploit-db.com/exploits/14706ExploitThird Party Advisory
securityfocus.com/bid/36945Broken LinkThird Party Advisory
securitytracker.com/id?1023157Broken LinkThird Party Advisory
us-cert.gov/cas/techalerts/TA09-314A.htmlThird Party AdvisoryUS Government Resource
zerodayinitiative.com/advisories/ZDI-09-083Third Party AdvisoryVDB Entry
docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-067PatchVendor Advisory
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6521Broken Link
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-3129US Government Resource

0 recent articles mention this CVE

Risk assessment · High

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1678 days
CVSS: 7.8 HIGH
EPSS (30-day exploit probability): 84.0% · top 1% of all CVEs
Weakness: CWE-787

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.