PT-2026-46402 · Microsoft · M365 Copilot

Guillermo Diaz + 2 · CVE-2026-45497 · Published 2026-06-04 · Updated 2026-06-09

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft 365 Copilot versions prior to June 2026

Description Improper neutralization of special elements used in a command allows an authorized attacker to execute code over a network. This issue, known as command injection, occurs when an application fails to properly filter or sanitize input used in a system command, enabling the execution of arbitrary code on the server.

Recommendations Update to the June 2026 security release.

Fix

RCE

Command Injection

Weakness Enumeration

CWE-77

Related Identifiers

CVE-2026-45497

Affected Products

M365 Copilot

References · 3

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45497 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45497 · Security Note
• https://twitter.com/threatcluster/status/2064426497448857989 · Twitter Post