# CVE-2009-3129: Microsoft Excel Featheader Record Memory Corruption Vulnerability

> CVE-2009-3129: Microsoft Excel Featheader Record Memory Corruption Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2009-3129
Last updated: 2025-10-22T00:05:54Z

- Published: 2009-11-11 19:00 UTC · Updated: 2025-10-22 00:05 UTC · Assigner: microsoft
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 84.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-03, federal due date 2022-03-24, ransomware use: Unknown

## 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."

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Microsoft: Excel

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2009-3129)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2009-3129)
- [http://archives.neohapsis.com/archives/bugtraq/2009-11/0080.html](http://archives.neohapsis.com/archives/bugtraq/2009-11/0080.html)
- [http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=832](http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=832)
- [http://osvdb.org/59860](http://osvdb.org/59860)
- [https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-067](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-067)
- [https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6521](https://oval.cisecurity.org/repository/search/definition/oval%253Aorg.mitre.oval%253Adef%253A6521)
- [http://www.exploit-db.com/exploits/14706](http://www.exploit-db.com/exploits/14706)
- [http://www.securityfocus.com/bid/36945](http://www.securityfocus.com/bid/36945)
- [http://www.securitytracker.com/id?1023157](http://www.securitytracker.com/id?1023157)
- [http://www.us-cert.gov/cas/techalerts/TA09-314A.html](http://www.us-cert.gov/cas/techalerts/TA09-314A.html)
- [http://www.zerodayinitiative.com/advisories/ZDI-09-083](http://www.zerodayinitiative.com/advisories/ZDI-09-083)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2009-3129 · Markdown: https://rewindex.com/cve/CVE-2009-3129.md · JSON: https://rewindex.com/api/v1/cves/CVE-2009-3129 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:46:01.150Z