CVE-2021-27057: Microsoft 365 Apps

High severity, CVSS 7.8. EPSS: 4.3% chance of exploitation in the next 30 days.

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

Published 2021-03-11. Last modified 2026-08-19.