CVE-2026-40379: critical vulnerability in Microsoft Entra
Azure Entra ID Spoofing Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.9%
Exposure of sensitive information to an unauthorized actor in Azure Entra ID allows an unauthorized attacker to perform spoofing over a network.
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
Affected products
Microsoft · Microsoft EntraRelated CVEs — Microsoft Entra
In the same product, most dangerous first.
CVE-2025-59246CRITICALAzure Entra ID Elevation of Privilege VulnerabilityEPSS 7.6%CVE-2026-69836CRITICALMicrosoft Entra ID Remote Code Execution VulnerabilityEPSS 1.8%CVE-2025-55241CRITICALAzure Entra ID Elevation of Privilege VulnerabilityEPSS 1.6%CVE-2024-43477HIGHMicrosoft Entra ID Elevation of Privilege VulnerabilityEPSS 1.0%CVE-2026-62916CRITICALMicrosoft Entra ID Elevation of Privilege VulnerabilityEPSS 0.9%CVE-2026-83941CRITICALEntra ID Elevation of Privilege VulnerabilityEPSS 0.8%