CVE-2026-108438: Microsoft 365 Apps For Enterprise

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Use after free in Microsoft Office Word allows an unauthorized attacker to disclose information over a network.

Affected products

• Microsoft Microsoft 365 Apps For Enterprise
• Microsoft Microsoft Office 365 For Mac: from 1.0.0, before 16.114.26101123 (fixed in 16.114.26101123)
• Microsoft Microsoft Office Ltsc For Mac 2021: from 16.0.1, before 16.114.26101123 (fixed in 16.114.26101123)
• Microsoft Microsoft Office Ltsc For Mac 2024: from 16.0.0, before 16.114.26101123 (fixed in 16.114.26101123)

Published 2026-10-15. Last modified 2026-10-16.