What’s Vulnerable › Vulnerabilities

CVE-2026-33843: Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-22 · updated 2026-08-10
• Weakness: CWE-288

Description

Authentication bypass using an alternate path or channel in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.

Affected products

• Microsoft Entra: all versions
• Microsoft Entra: all versions

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33843

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