CVE-2026-47645CWE-601

Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability

High · published June 19, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
54.7
In the wild
Unconfirmed
What it is

Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00758 · 54.7th percentile
Weakness
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
Published
2026-06-19T20:29Z
EPSS history
Timeline
  • 19 JUN 20:29Z
    Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability
    cvelistv5