CVE-2009-0238: Microsoft Office Remote Code Execution

High severity, CVSS 8.8. Actively exploited: in CISA KEV since 2026-04-14. EPSS: 43.2% chance of exploitation in the next 30 days.

Microsoft Office Excel 2000 SP3, 2002 SP3, 2003 SP3, and 2007 SP1; Excel Viewer 2003 Gold and SP3; Excel Viewer; Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1; and Excel in Microsoft Office 2004 and 2008 for Mac allow remote attackers to execute arbitrary code via a crafted Excel document that triggers an access attempt on an invalid object, as exploited in the wild in February 2009 by Trojan.Mdropper.AC.

Affected products

• Microsoft Excel: version 2000 only; 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 Office Excel Viewer: any version; version 2003 only

Published 2009-02-25. Last modified 2026-06-16.