CVE-2011-0097: Microsoft Excel

High severity, CVSS 9.3. EPSS: 31.6% chance of exploitation in the next 30 days.

Integer underflow in Microsoft Excel 2002 SP3, 2003 SP3, 2007 SP2, and 2010; Office 2004 and 2008 for Mac; Open XML File Format Converter for Mac; Excel Viewer SP2; and Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2 allows remote attackers to execute arbitrary code via a crafted 400h substream in an Excel file, which triggers a stack-based buffer overflow, aka "Excel Integer Overrun Vulnerability."

Affected products

• Microsoft Excel: affected versions not specified; version 2002 only; version 2003 only; version 2007 only; version 2010 only
• Microsoft Excel Viewer: affected versions not specified
• Microsoft Office: version 2004 only; version 2008 only
• Microsoft Office Compatibility Pack: version 2007 only
• Microsoft Open XML File Format Converter: any version

Published 2011-04-13. Last modified 2026-06-16.