CVE-2023-23398: Microsoft 365 Apps

High severity, CVSS 7.1. EPSS: 0.6% chance of exploitation in the next 30 days.

Microsoft Excel Spoofing Vulnerability

Affected products

• Microsoft 365 Apps: affected versions not specified
• Microsoft Excel: version 2013 only; version 2016 only
• Microsoft Office: version 2019 only
• Microsoft Office Long Term Servicing Channel: version 2021 only

Published 2023-03-14. Last modified 2026-06-17.