CVE-2011-1990: Microsoft Excel

High severity, CVSS 9.3. EPSS: 20.5% chance of exploitation in the next 30 days.

Microsoft Excel 2007 SP2; Excel in Office 2007 SP2; Excel Viewer SP2; Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP2; and Excel Services on Office SharePoint Server 2007 SP2 do not properly validate the sign of an unspecified array index, which allows remote attackers to execute arbitrary code via a crafted spreadsheet, aka "Excel Out of Bounds Array Indexing Vulnerability."

Affected products

• Microsoft Excel: version 2007 only
• Microsoft Excel Viewer: any version
• Microsoft Office: version 2007 only
• Microsoft Office Compatibility Pack: version 2007 only
• Microsoft SharePoint Server: version 2007 only

Published 2011-09-15. Last modified 2026-06-16.