CVE-2026-55145CWE-77

Outlook Copilot Tampering Vulnerability

Medium · published July 14, 2026

CVSS v3.1
6.3
EPSS
1%
Percentile
43.6
In the wild
Unconfirmed
What it is

Improper neutralization of special elements used in a command ('command injection') in Outlook Copilot allows an authorized attacker to perform tampering over a network.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00525 · 43.6th percentile
Weakness
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')
Published
2026-07-14T17:09Z
EPSS history
Timeline
  • 14 JUL 17:09Z
    Outlook Copilot Tampering Vulnerability
    cvelistv5