PT-2026-50802 · Microsoft · M365 Copilot

CVE-2026-54130

Published

2026-06-18

Updated

2026-06-25

CVSS v3.1

Critical

Vector

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

Name of the Vulnerable Software and Affected Versions M365 Copilot (affected versions not specified)

Description A missing authentication flaw in a critical function allows an unauthorized attacker to disclose information over a network.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Missing Authentication

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BDU:2026-08883

CVE-2026-54130

M365 Copilot