CVE-2011-1276: Microsoft Excel

High severity, CVSS 9.3. EPSS: 28.2% chance of exploitation in the next 30 days.

Buffer overflow in Microsoft Excel 2002 SP3, 2003 SP3, and 2007 SP2; 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 or cause a denial of service (memory corruption) via a crafted Excel spreadsheet, related to improper validation of record information, aka "Excel Buffer Overrun Vulnerability."

Affected products

• Microsoft Excel: version 2002 only; version 2003 only; version 2007 only
• Microsoft Excel Viewer: any version
• Microsoft Office: version 2004 only; version 2008 only
• Microsoft Office Compatibility Pack: version 2007 only
• Microsoft Open XML File Format Converter: any version

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