---
id: "CVE-2026-32202"
kind: "vulnerability"
aliases: ["CVE-2026-32202"]
title: "Protection mechanism failure in Windows Shell allows an unauthorized attacker to perform spoofing over a network"
severity: "medium"
cvss: 4.3
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Windows", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1607", "fixed": ["10.0.14393.9060"], "affected": "< 10.0.14393.9060", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1809", "fixed": ["10.0.17763.8644"], "affected": "< 10.0.17763.8644", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h2", "fixed": ["10.0.19044.7184"], "affected": "< 10.0.19044.7184", "ecosystem": "vendor"}, {"name": "microsoft windows 10 22h2", "fixed": ["10.0.19045.7184"], "affected": "< 10.0.19045.7184", "ecosystem": "vendor"}, {"name": "microsoft windows 11 23h2", "fixed": ["10.0.22631.6936"], "affected": "< 10.0.22631.6936", "ecosystem": "vendor"}, {"name": "microsoft windows 11 24h2", "fixed": ["10.0.26100.8246"], "affected": "< 10.0.26100.8246", "ecosystem": "vendor"}, {"name": "microsoft windows 11 25h2", "fixed": ["10.0.26200.8246"], "affected": "< 10.0.26200.8246", "ecosystem": "vendor"}, {"name": "microsoft windows 11 26h1", "fixed": ["10.0.28000.1836"], "affected": "< 10.0.28000.1836", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "= r2", "ecosystem": "vendor"}, {"name": "microsoft windows server 2016", "fixed": ["10.0.14393.9060"], "affected": "< 10.0.14393.9060", "ecosystem": "vendor"}, {"name": "microsoft windows server 2019", "fixed": ["10.0.17763.8644"], "affected": "< 10.0.17763.8644", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022", "fixed": ["10.0.20348.5020"], "affected": "< 10.0.20348.5020", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022 23h2", "fixed": ["10.0.25398.2274"], "affected": "< 10.0.25398.2274", "ecosystem": "vendor"}, {"name": "microsoft windows server 2025", "fixed": ["10.0.26100.32690"], "affected": "< 10.0.26100.32690", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "windows", "windows-shell"]
not_affected_if: ["unknown"]
published_at: "2026-04-14T18:17:27+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-32202", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32202", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# Protection mechanism failure in Windows Shell allows an unauthorized attacker to perform spoofing over a network

A protection mechanism failure in the Windows Shell lets an unauthorized attacker perform spoofing over the network. CISA lists it as actively exploited in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft Windows affected ? fixed ?
- vendor:microsoft windows 10 1607 affected < 10.0.14393.9060 fixed 10.0.14393.9060
- vendor:microsoft windows 10 1809 affected < 10.0.17763.8644 fixed 10.0.17763.8644
- vendor:microsoft windows 10 21h2 affected < 10.0.19044.7184 fixed 10.0.19044.7184
- vendor:microsoft windows 10 22h2 affected < 10.0.19045.7184 fixed 10.0.19045.7184
- vendor:microsoft windows 11 23h2 affected < 10.0.22631.6936 fixed 10.0.22631.6936
- vendor:microsoft windows 11 24h2 affected < 10.0.26100.8246 fixed 10.0.26100.8246
- vendor:microsoft windows 11 25h2 affected < 10.0.26200.8246 fixed 10.0.26200.8246
- vendor:microsoft windows 11 26h1 affected < 10.0.28000.1836 fixed 10.0.28000.1836
- vendor:microsoft windows server 2012 affected ? fixed ?
- vendor:microsoft windows server 2012 affected = r2 fixed ?
- vendor:microsoft windows server 2016 affected < 10.0.14393.9060 fixed 10.0.14393.9060
- vendor:microsoft windows server 2019 affected < 10.0.17763.8644 fixed 10.0.17763.8644
- vendor:microsoft windows server 2022 affected < 10.0.20348.5020 fixed 10.0.20348.5020
- vendor:microsoft windows server 2022 23h2 affected < 10.0.25398.2274 fixed 10.0.25398.2274
- vendor:microsoft windows server 2025 affected < 10.0.26100.32690 fixed 10.0.26100.32690

## Fix

Apply the Microsoft mitigations or update for CVE-2026-32202 per vendor instructions; if mitigations are unavailable, discontinue use of the affected product (CISA required action).

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-32202
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-32202

## From the sources

Microsoft Windows Shell contains a protection mechanism failure vulnerability that allows an unauthorized attacker to perform spoofing over a network.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_