---
id: CVE-2026-50652
title: >-
  Deserialization of untrusted data in Azure Active Directory allows an
  unauthorized attacker to deny service over a network.
summary: >-
  Deserialization of untrusted data in Azure Active Directory allows an
  unauthorized attacker to deny service over a network.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-502
published: '2026-07-14'
updated: '2026-07-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-50652'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50652'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.0173
epssPercentile: 0.76586
ingestedAt: '2026-07-17T19:14:48.328Z'
vendor: Microsoft
product: Azure Active Directory
affected:
  - azure_active_directory >= 2021 < 5.7.1
  - .net_framework_3.5 >= 3.5.0 < 2.0.50727.9182 & 3.0.30729.9168
  - >-
    .net_framework_3.5_and_4.7.2 >= 4.7.0 < 2.0.50727.9069 & 3.0.30729.9067 &
    4.7.4143.0
  - >-
    .net_framework_3.5_and_4.8 >= 4.8.0 < 2.0.50727.9069 & 3.0.30729.9067 &
    4.8.4803.0
  - >-
    .net_framework_3.5_and_4.8.1 >= 4.8.1 < 2.0.50727.9182 & 3.0.30729.9168 &
    4.8.9339.0
  - .net_framework_4.6.2_4.7_4.7.1_4.7.2 >= 4.7.0 < 4.7.4143.0
  - .net_framework_4.8 >= 4.8.0 < 4.8.4803.0
  - .net_framework_4.8.1 >= 4.8.0.0 < 4.8.9340.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-07-14T17:49:29.276505Z'
---

## Overview

Deserialization of untrusted data in Azure Active Directory allows an unauthorized attacker to deny service over a network.

## Remediation

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