1. Home
  2. CVE Database
  3. CVE-2026-40379
CRITICAL · 9.3

CVE-2026-40379

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

Vulnerability Description

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

CVSS Score

9.3

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
MicrosoftEntra Id-

Related Weaknesses (CWE)

CWE-200

References

FAQ

What is CVE-2026-40379?

CVE-2026-40379 is a vulnerability with a CVSS score of 9.3 (CRITICAL). Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.

How severe is CVE-2026-40379?

CVE-2026-40379 has been rated CRITICAL with a CVSS base score of 9.3/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-40379?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Entra Id.