CVE-2009-3133: Microsoft Compatibility Pack Word Excel PowerPoint

High severity, CVSS 9.3. EPSS: 24.9% chance of exploitation in the next 30 days.

Microsoft Office Excel 2002 SP3, Office 2004 and 2008 for Mac, and Open XML File Format Converter for Mac allow remote attackers to execute arbitrary code via a spreadsheet containing a malformed object that triggers memory corruption, related to "loading Excel records," aka "Excel Document Parsing Memory Corruption Vulnerability."

Affected products

• Microsoft Compatibility Pack Word Excel PowerPoint: version 2007 only
• Microsoft Excel: version 2002 only; version 2003 only; version 2007 only
• Microsoft Excel Viewer: any version; version 2003 only
• Microsoft Office: version 2004 only; version 2008 only
• Microsoft Open XML File Format Converter: any version

Published 2009-11-11. Last modified 2026-06-16.