CVE-2026-32202

Windows Shell Spoofing Vulnerability

CVE-2026-32202 is fixed in 30 products on 1 platform, first by KB5099535, released July 14, 2026. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on April 28, 2026. Patch Radar priority: Patch now.

Patch nowCISA KEV

CVSS

4.3

Important

Exploitation

Exploited

Reported by the vendor

CISA KEV

Apr 28, 2026

Federal due date May 12, 2026

EPSS

0.7090

99th percentile

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

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 1607 for 32-bit Systems	14393.9339	KB5099535	Jul 14, 2026
Windows 10 Version 1607 for x64-based Systems	14393.9339	KB5099535	Jul 14, 2026
Windows 10 Version 1809 for 32-bit Systems	17763.9020	KB5099538	Jul 14, 2026
Windows 10 Version 1809 for x64-based Systems	17763.9020	KB5099538	Jul 14, 2026
Windows 10 Version 21H2 for 32-bit Systems		KB5099539	Jul 14, 2026
Windows 10 Version 21H2 for ARM64-based Systems		KB5099539	Jul 14, 2026
Windows 10 Version 21H2 for x64-based Systems		KB5099539	Jul 14, 2026
Windows 10 Version 22H2 for 32-bit Systems		KB5099539	Jul 14, 2026
Windows 10 Version 22H2 for ARM64-based Systems		KB5099539	Jul 14, 2026
Windows 10 Version 22H2 for x64-based Systems		KB5099539	Jul 14, 2026
Windows 11 Version 23H2 for ARM64-based Systems	22631.7376	KB5099414	Jul 14, 2026
Windows 11 Version 23H2 for x64-based Systems	22631.7376	KB5099414	Jul 14, 2026
Windows 11 Version 24H2 for ARM64-based Systems		KB5101650	Jul 14, 2026
Windows 11 Version 24H2 for x64-based Systems		KB5101650	Jul 14, 2026
Windows 11 Version 25H2 for ARM64-based Systems		KB5101650	Jul 14, 2026
Windows 11 Version 25H2 for x64-based Systems		KB5101650	Jul 14, 2026
Windows 11 Version 26H1 for ARM64-based Systems	28000.2525	KB5101649	Jul 14, 2026
Windows 11 version 26H1 for x64-based Systems	28000.2525	KB5101649	Jul 14, 2026
Windows Server 2012		KB5099445	Jul 14, 2026
Windows Server 2012 (Server Core installation)		KB5099445	Jul 14, 2026
Windows Server 2012 R2		KB5099444	Jul 14, 2026
Windows Server 2012 R2 (Server Core installation)		KB5099444	Jul 14, 2026
Windows Server 2016	14393.9339	KB5099535	Jul 14, 2026
Windows Server 2016 (Server Core installation)	14393.9339	KB5099535	Jul 14, 2026
Windows Server 2019	17763.9020	KB5099538	Jul 14, 2026
Windows Server 2019 (Server Core installation)	17763.9020	KB5099538	Jul 14, 2026
Windows Server 2022	20348.5386	KB5099540	Jul 14, 2026
Windows Server 2022 (Server Core installation)	20348.5386	KB5099540	Jul 14, 2026
Windows Server 2025	26100.33158	KB5099536	Jul 14, 2026
Windows Server 2025 (Server Core installation)	26100.33158	KB5099536	Jul 14, 2026

Details

Published
April 14, 2026
Weakness
Protection Mechanism Failure
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.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32202

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