CVE-2026-23657: Microsoft 365 Apps

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Affected products

• Microsoft 365 Apps: affected versions not specified
• Microsoft Office Long Term Servicing Channel: version 2024 only

Published 2026-04-14. Last modified 2026-06-17.