CVE-2012-2543: Microsoft Excel

High severity, CVSS 9.3. EPSS: 26.2% chance of exploitation in the next 30 days.

Stack-based buffer overflow in Microsoft Excel 2007 SP2 and SP3 and 2010 SP1; Office 2011 for Mac; Excel Viewer; and Office Compatibility Pack SP2 and SP3 allows remote attackers to execute arbitrary code via a crafted spreadsheet, aka "Excel Stack Overflow Vulnerability."

Affected products

• Microsoft Excel: version 2007 only; version 2010 only
• Microsoft Excel Viewer: any version
• Microsoft Office: version 2011 only
• Microsoft Office Compatibility Pack: any version

Published 2012-11-14. Last modified 2026-06-16.