CVE-2020-17129: Microsoft 365 Apps

High severity, CVSS 7.8. EPSS: 3.5% chance of exploitation in the next 30 days.

Microsoft Excel Remote Code Execution Vulnerability

Affected products

• Microsoft 365 Apps: affected versions not specified
• Microsoft Excel: version 2010 only; version 2013 only; version 2016 only
• Microsoft Office: version 2019 only
• Microsoft Office Online Server: affected versions not specified
• Microsoft Office Web Apps: version 2013 only

Published 2020-12-10. Last modified 2026-06-17.