---
id: CVE-2026-33843
title: >-
  Authentication bypass using an alternate path or channel in Microsoft Azure
  Active Directory B2C allows an unauthorized attacker to elevate privileges
  over a network.
summary: >-
  Authentication bypass using an alternate path or channel in Microsoft Azure
  Active Directory B2C allows an unauthorized attacker to elevate privileges
  over a network.
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-288
vendor: microsoft
product: entra_id
affected:
  - entra_id
published: '2026-05-22'
updated: '2026-07-23'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-33843'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33843'
    label: secure@microsoft.com
tags:
  - nvd
epss: 0.00865
epssPercentile: 0.56878
ingestedAt: '2026-07-23T11:17:34.435Z'
---

## Overview

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

- `entra_id`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.