CVE-2026-54130

Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54130	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:microsoft:365_copilot:-:*:*:*:*:*:*:*

History

25 Jun 2026, 18:59

Type	Values Removed	Values Added
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54130 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54130 - Vendor Advisory
First Time		Microsoft 365 Copilot Microsoft
CPE		cpe:2.3:a:microsoft:365_copilot:-:::::::*

18 Jun 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-18 22:16

Updated : 2026-06-25 18:59

NVD link : CVE-2026-54130

Mitre link : CVE-2026-54130

CVE.ORG link : CVE-2026-54130

JSON object : View

Products Affected

microsoft

365_copilot

CWE

CWE-306

Missing Authentication for Critical Function

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