CVE-2026-33843

CRITICAL

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

CVSS v3.1 Score

9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Published: 5/22/2026Modified: 5/27/2026

Related Intelligence (1)

CRITICALVulnerability

NVD CRITICAL: CVE-2026-33843 — Authentication bypass using an alternate path or channel in Microsoft Azure Acti...

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

CVE-2026-33843
NIST NVD

References (1)

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