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CVE Vulnerability Details :

CVE-2026-54130

PUBLISHED

More Info Official Page

Assigner-microsoft

Assigner Org ID-f38d906d-7342-40ea-92c1-6c4a2c6478c8

Published At-18 Jun, 2026 | 21:42

Updated At-24 Jun, 2026 | 03:55

▼CVE Numbering Authority (CNA)

M365 Copilot Information Disclosure Vulnerability

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

Affected Products

Vendor

Microsoft Corporation

Product

Microsoft 365 Copilot

Versions

Affected

Problem Types

Type	CWE ID	Description
CWE	CWE-306	CWE-306: Missing Authentication for Critical Function

Type: CWE

CWE ID: CWE-306

Description: CWE-306: Missing Authentication for Critical Function

Metrics

Version	Base score	Base severity	Vector
3.1	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Version: 3.1

Base score: 9.8

Base severity: CRITICAL

Vector:

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References

Hyperlink	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54130	vendor-advisory patch

Hyperlink: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54130

Resource:

vendor-advisory

patch

▼Authorized Data Publishers (ADP)

CISA ADP Vulnrichment

Affected Products

Affected

Problem Types

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References

Affected Products

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References