CVE-2011-0978: Microsoft Excel

High severity, CVSS 9.3. EPSS: 42.6% chance of exploitation in the next 30 days.

Stack-based buffer overflow in Microsoft Excel 2002 SP3, 2003 SP3, and 2007 SP2; Office 2004 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 vectors related to an axis properties record, and improper incrementing of an array index, aka "Excel Array Indexing Vulnerability."

Affected products

• Microsoft Excel: version 2002 only; version 2003 only; version 2007 only
• Microsoft Excel Viewer: affected versions not specified
• Microsoft Office: version 2004 only
• Microsoft Office Compatibility Pack: version 2007 only

Published 2011-02-10. Last modified 2026-06-16.