CVE-2026-42893 HIGH

CVE-2026-42893: Microsoft Outlook for iOS Tampering Vulnerability

Vendor Microsoft
Product Microsoft Outlook for iOS
Weakness CWE-77
Published May 12, 2026
Last update June 9, 2026
View on NVD All CVEs

CVSS base score

7.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C

What the vulnerability does

01Description

Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to perform tampering over a network.

Key dates

02Disclosure timeline

May 12, 2026 CVE published
June 9, 2026 Record updated