CVE-2026-41090 CRITICAL

CVE-2026-41090: Microsoft Copilot Tampering Vulnerability

Vendor Microsoft
Product Microsoft 365 Copilot for iOS
Weakness CWE-77
Published May 22, 2026
Last update June 9, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/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 Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.

Key dates

02Disclosure timeline

May 22, 2026 CVE published
June 9, 2026 Record updated