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CVE-2026-33843

Microsoft Azure Active Directory B2C Elevation of Privilege Vulnerability

Published: May 22, 2026Updated: May 27, 2026 Sources: CVE List NVD BDUCWE-288
9.1CRITICAL
NVD MITRE
EPSS Score
0.5%
Top 62.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-288

Affected Products

Microsoft Corp
commercial·USaka microsoft, microsoft corporation
Microsoft Entra IDOn-premSecurity Product
Security Products / identity-access-mgmt
entra idSaaSSaaS Service
Security Products / identity-access-mgmt
Microsoft EntraOn-prem
Operating Systems / windows

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-33843?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33843
msrc.microsoft.com
News mentions
1

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