CVE-2009-0100: Microsoft Office

High severity, CVSS 9.3. EPSS: 28.8% chance of exploitation in the next 30 days.

Microsoft Office Excel 2000 SP3, 2002 SP3, 2003 SP3, and 2007 SP1; Excel in Microsoft Office 2004 and 2008 for Mac; Microsoft Office Excel Viewer and Excel Viewer 2003 SP3; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 do not properly parse the Excel spreadsheet file format, which allows remote attackers to execute arbitrary code via a crafted spreadsheet that contains a malformed object with "an offset and a two-byte value" that trigger a memory calculation error, aka "Memory Corruption Vulnerability."

Affected products

• Microsoft Office: version 2004 only; version 2008 only
• Microsoft Office Compatibility Pack For Word Excel Ppt 2007: any version
• Microsoft Office Excel: version 2000 only; version 2002 only; version 2003 only; version 2007 only
• Microsoft Office Excel Viewer: any version; version 2003 only

Published 2009-04-15. Last modified 2026-06-16.