CVE-2026-40379

critical Microsoft
CVSS v3 Base Score
9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
EPSS Score
0.1%
Exploitation probability in 30 days
Top 80% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Published: May 12, 2026 (58 days ago)
Last Modified: May 21, 2026
Vendor: Microsoft
Source: NVD

Description

Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.

CWE

CWE-200

Affected Products

microsoft entra id

References

🔗 msrc.microsoft.com