Microsoft Azure Active Directory vulnerabilities

6 CVEs affecting Microsoft Azure Active Directory, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-50481, published 2026-08-07.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2021-42306, published 2021-11-24. High severity, CVSS 8.1. EPSS: 3.3% chance of exploitation in the next 30 days. An information disclosure vulnerability manifests when a user or an application uploads unprotected private key data as part of an authentication certificate keyCredential  on an Azure AD Application…
• CVE-2026-50652, published 2026-07-14. High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days. Deserialization of untrusted data in Azure Active Directory allows an unauthorized attacker to deny service over a network.
• CVE-2026-50653, published 2026-07-14. High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days. Loop with unreachable exit condition ('infinite loop') in Azure Active Directory allows an unauthorized attacker to deny service over a network.
• CVE-2026-45480, published 2026-06-19. Critical severity, CVSS 10.0. EPSS: 0.9% chance of exploitation in the next 30 days. Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
• CVE-2026-50481, published 2026-08-07. Critical severity, CVSS 9.9. EPSS: 0.8% chance of exploitation in the next 30 days. Modification of assumed-immutable data (maid) in Azure Active Directory allows an authorized attacker to elevate privileges over a network.
• CVE-2024-21381, published 2024-02-13. Medium severity, CVSS 6.8. EPSS: 0.4% chance of exploitation in the next 30 days. Microsoft Azure Active Directory B2C Spoofing Vulnerability