CVE-2024-42220: Microsoft Outlook

Critical severity, CVSS 9.1. EPSS: 0.7% chance of exploitation in the next 30 days.

A library injection vulnerability exists in Microsoft Outlook 16.83.3 for macOS. A specially crafted library can leverage Outlook's access privileges, leading to a permission bypass. A malicious application could inject a library and start the program to trigger this vulnerability and then make use of the vulnerable application's permissions.

Affected products

• Microsoft Outlook: version 16.83.3 only

Published 2024-12-18. Last modified 2026-06-17.