CVE-2025-21383: Microsoft 365 Apps

Medium severity, CVSS 5.5. EPSS: 1% chance of exploitation in the next 30 days.

Microsoft Excel Information Disclosure Vulnerability

Affected products

• Microsoft 365 Apps: affected versions not specified
• Microsoft Excel: version 2016 only
• Microsoft Office: version 2019 only
• Microsoft Office Long Term Servicing Channel: version 2021 only; version 2024 only

Published 2025-02-11. Last modified 2026-06-17.