---
id: CVE-2026-32178
title: .NET Spoofing Vulnerability
summary: >-
  Improper neutralization of special elements in .NET allows an unauthorized
  attacker to perform spoofing over a network.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-138
vendor: Microsoft
product: .NET 10.0
affected:
  - .net_10.0 >= 10.0.0 < 10.0.6
  - .net_8.0 >= 8.0 < 8.0.26
  - .net_8.0 >= 8.0.0 < 8.0.26
  - .net_9.0 >= 9.0.0 < 9.0.15
  - visual_studio_2022_version_17.12 >= 17.12.0 < 17.12.19
  - visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.30
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-04-15T10:40:37.117716Z'
published: '2026-04-14'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T17:25:20.914Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-32178'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32178'
    label: .NET Spoofing Vulnerability
tags:
  - cve.org
epss: 0.02094
epssPercentile: 0.80857
ingestedAt: '2026-09-25T18:14:20.446Z'
---

## Overview

Improper neutralization of special elements in .NET allows an unauthorized attacker to perform spoofing over a network.

## Affected

- `.net_10.0 >= 10.0.0 < 10.0.6`
- `.net_8.0 >= 8.0 < 8.0.26`
- `.net_8.0 >= 8.0.0 < 8.0.26`
- `.net_9.0 >= 9.0.0 < 9.0.15`
- `visual_studio_2022_version_17.12 >= 17.12.0 < 17.12.19`
- `visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.30`

## Remediation

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