CVE-2009-0557: Microsoft Office Object Record Corruption Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2022-06-08. EPSS: 53% chance of exploitation in the next 30 days.

Excel in Microsoft Office 2000 SP3, Office XP SP3, Office 2003 SP3, and Office 2004 and 2008 for Mac; Excel in 2007 Microsoft Office System SP1 and SP2; Open XML File Format Converter for Mac; Microsoft Office Excel Viewer 2003 SP3; Microsoft Office Excel Viewer; and Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats SP1 and SP2 allow remote attackers to execute arbitrary code via a crafted Excel file with a malformed record object, aka "Object Record Corruption Vulnerability."

Affected products

• Microsoft Office: version 2000 only; version 2003 only; version 2004 only; version 2007 only; version 2008 only; version xp only
• Microsoft Office Compatibility Pack: version 2007 only
• Microsoft Office Excel Viewer: affected versions not specified; version 2003 only
• Microsoft Office SharePoint Server: version 2007 only
• Microsoft Open XML File Format Converter: affected versions not specified

Published 2009-06-10. Last modified 2026-06-16.