CVE-2009-3134: Microsoft Compatibility Pack Word Excel PowerPoint

High severity, CVSS 9.3. EPSS: 25.8% chance of exploitation in the next 30 days.

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 do not properly parse the Excel file format, which allows remote attackers to execute arbitrary code via a spreadsheet with a malformed record object, aka "Excel Field Sanitization 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.