Command Injection in Outlook for iOS - CVE-2026-42893
Published: May 13, 2026
Vulnerability identifier: #VU131372
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42893
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary commands on the system.
The vulnerability exists due to insufficient input validation in Microsoft Outlook for iOS. A remote attacker can pass specially crafted data to the application and execute arbitrary commands.
Affected software
Outlook for iOS
How to mitigate CVE-2026-42893
Install updates from vendor's website.
Outlook for iOS - update to 5.2617.1