CVE-2026-33102 CRITICAL

CVE-2026-33102: Microsoft 365 Copilot Elevation of Privilege Vulnerability

Vendor Microsoft
Product Microsoft 365 Copilot
Weakness CWE-601 · Open redirect
Published April 23, 2026
Last update June 1, 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

Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.

Key dates

02Disclosure timeline

April 23, 2026 CVE published
June 1, 2026 Record updated