Is CVE-2009-3129 actively exploited?

CVE-2009-3129 has no public evidence of in-the-wild exploitation as of 2025-10-22.

What is the CVSS score for CVE-2009-3129?

CVE-2009-3129 has a CVSS score of 7.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

How do I patch CVE-2009-3129?

Patch guidance is available from microsoft security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2009-3129.

Fix CVE-2009-3129 - HIGH microsoft excel

Q: Which products are affected by CVE-2009-3129?

10 products: microsoft excel, microsoft excel, microsoft excel, microsoft excel, microsoft excel viewer, and 5 more.

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."

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: none
User Action: required
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-787 · Out-of-bounds Write CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: MICROSOFT
Published: 11/11/2009
Last Modified: 10/22/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

microsoft : excelmicrosoft : excelmicrosoft : excelmicrosoft : excelmicrosoft : excel_viewermicrosoft : excel_viewermicrosoft : excel_viewermicrosoft : officemicrosoft : officemicrosoft : open_xml_file_format_converter

Remediation Guidance

Executive Summary

View on NIST NVD