CVE-2026-32202MicrosoftOperating systemsApril 28, 2026

Microsoft Windows Protection Mechanism Failure Vulnerability

Medium 4.3Actively exploited

Description

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

What to do

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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Details

Vendor
Microsoft
Product
Windows
CVE
CVE-2026-32202
Affected versions
Windows 10 Version 1607 10.0: from 10.0.14393.0 to 10.0.14393.9339 (excluded) — fixed in 10.0.14393.9339
Windows 10 Version 1809 10.0: from 10.0.17763.0 to 10.0.17763.9020 (excluded) — fixed in 10.0.17763.9020
Windows 10 Version 21H2 10.0: from 10.0.19044.0 to 10.0.19044.7548 (excluded) — fixed in 10.0.19044.7548
Windows 10 Version 22H2 10.0: from 10.0.19045.0 to 10.0.19045.7548 (excluded) — fixed in 10.0.19045.7548
Windows 11 version 23H2 10.0: from 10.0.22631.0 to 10.0.22631.7376 (excluded) — fixed in 10.0.22631.7376
Windows 11 Version 23H2 10.0: from 10.0.22631.0 to 10.0.22631.7376 (excluded) — fixed in 10.0.22631.7376
Windows 11 Version 24H2 10.0: from 10.0.26100.0 to 10.0.26100.8875 (excluded) — fixed in 10.0.26100.8875
Windows 11 Version 25H2 10.0: from 10.0.26200.0 to 10.0.26200.8875 (excluded) — fixed in 10.0.26200.8875
Windows 11 version 26H1 10.0: from 10.0.28000.0 to 10.0.28000.2525 (excluded) — fixed in 10.0.28000.2525
Windows Server 2012 6.2: from 6.2.9200.0 to 6.2.9200.26226 (excluded) — fixed in 6.2.9200.26226
Windows Server 2012 (Server Core installation) 6.2: from 6.2.9200.0 to 6.2.9200.26226 (excluded) — fixed in 6.2.9200.26226
Windows Server 2012 R2 6.3: from 6.3.9600.0 to 6.3.9600.23291 (excluded) — fixed in 6.3.9600.23291
Windows Server 2012 R2 (Server Core installation) 6.3: from 6.3.9600.0 to 6.3.9600.23291 (excluded) — fixed in 6.3.9600.23291
Windows Server 2016 10.0: from 10.0.14393.0 to 10.0.14393.9339 (excluded) — fixed in 10.0.14393.9339
Windows Server 2016 (Server Core installation) 10.0: from 10.0.14393.0 to 10.0.14393.9339 (excluded) — fixed in 10.0.14393.9339
Windows Server 2019 10.0: from 10.0.17763.0 to 10.0.17763.9020 (excluded) — fixed in 10.0.17763.9020
Windows Server 2019 (Server Core installation) 10.0: from 10.0.17763.0 to 10.0.17763.9020 (excluded) — fixed in 10.0.17763.9020
Windows Server 2022 10.0: from 10.0.20348.0 to 10.0.20348.5386 (excluded) — fixed in 10.0.20348.5386
Windows Server 2025 10.0: from 10.0.26100.0 to 10.0.26100.33158 (excluded) — fixed in 10.0.26100.33158
Windows Server 2025 (Server Core installation) 10.0: from 10.0.26100.0 to 10.0.26100.33158 (excluded) — fixed in 10.0.26100.33158 (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
4.3
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
May 12, 2026 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
April 28, 2026

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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