CVE-2011-0098: Microsoft Excel

High severity, CVSS 9.3. EPSS: 30.5% chance of exploitation in the next 30 days.

Integer signedness error 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 an XLS file with a large record size, aka "Excel Heap Overflow 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.