CVE-2026-33843

Name: CVE-2026-33843
Creator: NVD / NIST
Published: 2026-05-22T23:16:44.163+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.47%

Last modified Jun 17, 2026

CVE-2026-33843 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Authentication bypass using an alternate path or channel in Microsoft Azure Active Directory B2C allows an unauthorized attacker to elevate privileges over a network.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.47%

37.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-288

Affected Software

Vendor	Product	Versions
Microsoft	Entra Id	All versions

References

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

Timeline

Published: May 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-33843?

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

How severe is CVE-2026-33843?

CVE-2026-33843 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2026-33843?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-33843?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST