---
id: CVE-2026-32226
title: >-
  Concurrent execution using shared resource with improper synchronization
  ('race condition') in .NET Framework allows an unauthorized attacker to deny
  service over a network.
summary: >-
  Concurrent execution using shared resource with improper synchronization
  ('race condition') in .NET Framework allows an unauthorized attacker to deny
  service over a network.
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-362
vendor: microsoft
product: .net_framework
affected:
  - .net_framework = 3.5
  - .net_framework = 4.7.2
  - .net_framework = 4.8
  - .net_framework = 4.8.1
published: '2026-04-14'
updated: '2026-07-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-32226'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32226'
    label: secure@microsoft.com
tags:
  - nvd
epss: 0.00655
epssPercentile: 0.49178
ingestedAt: '2026-07-26T10:11:59.032Z'
---

## Overview

Concurrent execution using shared resource with improper synchronization ('race condition') in .NET Framework allows an unauthorized attacker to deny service over a network.

## Affected

- `.net_framework = 3.5`
- `.net_framework = 4.7.2`
- `.net_framework = 4.8`
- `.net_framework = 4.8.1`

## Remediation

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