CVE-2008-3471: Microsoft Excel

High severity, CVSS 9.3. EPSS: 52.3% chance of exploitation in the next 30 days.

Stack-based buffer overflow in Microsoft Excel 2000 SP3, 2002 SP3, 2003 SP2 and SP3, and 2007 Gold and SP1; Office Excel Viewer 2003 SP3; Office Excel Viewer; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Gold and SP1; Office 2004 and 2008 for Mac; and Open XML File Format Converter for Mac allows remote attackers to execute arbitrary code via a BIFF file with a malformed record that triggers a user-influenced size calculation, aka "File Format Parsing Vulnerability."

Affected products

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

Published 2008-10-15. Last modified 2026-06-16.