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Description

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

PUBLISHED Reserved 2026-04-11 | Published 2026-05-12 | Updated 2026-05-20 | Assigner microsoft




CRITICAL: 9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C

Problem types

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Product status

-
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40379 (Azure Entra ID Spoofing Vulnerability) vendor-advisory patch

cve.org (CVE-2026-40379)

nvd.nist.gov (CVE-2026-40379)

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