CVE-2026-45497CWE-77

Microsoft M365 Copilot Remote Code Execution Vulnerability

High · published June 4, 2026

CVSS v3.1
7.7
EPSS
1%
Percentile
48.4
In the wild
Unconfirmed
What it is

Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an authorized attacker to execute code over a network.

The record
Technical detail
CVSS v3.1
7.7 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00607 · 48.4th percentile
Weakness
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')
Published
2026-06-04T22:00Z
EPSS history
Timeline
  • 04 JUN 22:00Z
    Microsoft M365 Copilot Remote Code Execution Vulnerability
    cvelistv5