CVE-2026-108448: Microsoft 365 Apps For Enterprise

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code 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 2021: from 16.0.1, before 16.0.14334.20974 (fixed in 16.0.14334.20974)
• Microsoft Microsoft Office Ltsc 2024: from 16.0.0, before 16.0.17932.21056 (fixed in 16.0.17932.21056)
• 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 2026-10-17.