---
id: CVE-2026-118147
title: Visual Studio Spoofing Vulnerability
summary: >-
  Improper certificate validation in Visual Studio allows an unauthorized
  attacker to perform spoofing over a network.
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-295
vendor: Microsoft
product: Microsoft Visual Studio 2017 version 15.9
affected:
  - visual_studio_2017_version_15.9 >= 15.9.0 < 15.9.84
  - visual_studio_2019_version_16.11 >= 16.11.0 < 16.11.62
  - visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.44
  - visual_studio_2026_version_18.11 >= 18.11.0 < 18.11.3
published: '2026-10-31'
updated: '2026-10-31'
sourceUpdated: '2026-10-31T18:13:37.059Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118147'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-118147'
    label: Visual Studio Spoofing Vulnerability
tags:
  - cve.org
epss: 0.00612
epssPercentile: 0.49429
ingestedAt: '2026-11-05T18:28:50.654Z'
---

## Overview

Improper certificate validation in Visual Studio allows an unauthorized attacker to perform spoofing over a network.

## Affected

- `visual_studio_2017_version_15.9 >= 15.9.0 < 15.9.84`
- `visual_studio_2019_version_16.11 >= 16.11.0 < 16.11.62`
- `visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.44`
- `visual_studio_2026_version_18.11 >= 18.11.0 < 18.11.3`

## Remediation

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