CVE-2026-33102CWE-601

Microsoft 365 Copilot Elevation of Privilege Vulnerability

Critical · published April 23, 2026

CVSS v3.1
9.3
EPSS
1%
Percentile
53.2
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.3 · CRITICAL
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
CVSS v4.0
Not supplied
EPSS
0.00716 · 53.2th percentile
Weakness
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
Published
2026-04-23T21:35Z
EPSS history
Timeline
  • 23 APR 21:35Z
    Microsoft 365 Copilot Elevation of Privilege Vulnerability
    cvelistv5