CVE-2015-2558: Microsoft Excel

High severity, CVSS 9.3. EPSS: 20.2% chance of exploitation in the next 30 days.

Use-after-free vulnerability in Microsoft Excel 2007 SP3, Excel 2010 SP2, Excel 2013 SP1, Excel 2013 RT SP1, Excel 2016, Excel for Mac 2011, Excel 2016 for Mac, Excel Viewer, Office Compatibility Pack SP3, and Excel Services on SharePoint Server 2007 SP3, 2010 SP2, and 2013 SP1 allows remote attackers to execute arbitrary code via a long fileVersion element in an Office document, aka "Microsoft Office Memory Corruption Vulnerability."

Affected products

• Microsoft Excel: version 2007 only; version 2010 only; version 2013 only; version 2016 only
• Microsoft Excel For Mac: version 2011 only; version 2016 only
• Microsoft Excel Viewer: any version
• Microsoft Office Compatibility Pack: any version
• Microsoft Office SharePoint Server: version 2007 only
• Microsoft SharePoint Server: version 2010 only; version 2013 only

Published 2015-10-14. Last modified 2026-06-17.