CVE-2026-40379CWE-200

Azure Entra ID Spoofing Vulnerability

Critical · published May 12, 2026

CVSS v3.1
9.3
EPSS
1%
Percentile
60.8
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.3 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.00947 · 60.8th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-05-12T16:58Z
EPSS history
Timeline
  • 12 MAY 16:58Z
    Azure Entra ID Spoofing Vulnerability
    cvelistv5