CVE-2021-28455: Microsoft 365 Apps

High severity, CVSS 8.8. EPSS: 2.1% chance of exploitation in the next 30 days.

Microsoft Jet Red Database Engine and Access Connectivity Engine Remote Code Execution Vulnerability

Affected products

• Microsoft 365 Apps: affected versions not specified
• Microsoft Office: version 2013 only; version 2016 only; version 2019 only
• Microsoft Windows 10: affected versions not specified; version 20h2 only; version 1607 only; version 1803 only; version 1809 only; version 1909 only; …
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Rt 8.1: affected versions not specified
• Microsoft Windows Server 2008: affected versions not specified
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: affected versions not specified; version 20h2 only; version 1909 only; version 2004 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2021-05-11. Last modified 2026-06-17.