CVE-2026-54130
CRITICAL EPSS 43.3%
Published Jun 18, 20261w ago · Modified Jun 24, 20261w ago
9.8 CVSS 3.1
Published Jun 18, 2026 1w ago
Last Modified Jun 24, 2026 1w ago
Description
Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
43.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-306 Missing Authentication for Critical Function Authentication
References 1
- msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54130
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.