IRONSMITHINTEL
MEDIUMCVSS4.3
|
Actively Exploited
|CISA KEV|CVE-2026-32202|Auth: none — unauthenticated|Reboot: required|Manual only

KB5082052: Windows Server Security Update (April 2026)

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

Published Apr 14, 2026 · Updated May 16, 2026
Why patchRisk explained in plain English
Worst-case scenarioIf unpatched

A remote attacker, without authentication, can achieve partial data exposure. Federal agencies are required to remediate by 2026-05-12 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Software Vulnerability (CWE-693) (CWE-693) vulnerability in Microsoft Windows. Protection mechanism failure in Windows Shell allows an unauthorized attacker to perform spoofing over a network. Exploitation requires remote network access, low attack complexity, no authentication required, and user interaction required.

📧

Phishing link

→

🖼

Malicious file

🔓

Server compromised

Am I affected?Quick check

Probably yes if any of these apply:

●Windows Administrators
●Systems Engineers
●IT Security
●Running windows 10 1607: v < 10.0.14393.9060; windows 10 1809: v < 10.0.17763.8644; windows 10 21h2: v < 10.0.19044.7184; windows 10 22h2: v < 10.0.19045.7184; windows 11 23h2: v < 10.0.22631.6936; windows 11 24h2: v < 10.0.26100.8246; windows 11 25h2: v < 10.0.26200.8246; windows 11 26h1: v < 10.0.28000.1836; windows server 2012: -, r2; windows server 2016: v < 10.0.14393.9060; windows server 2019: v < 10.0.17763.8644; windows server 2022: v < 10.0.20348.5020; windows server 2022 23h2: v < 10.0.25398.2274; windows server 2025: v < 10.0.26100.32690
Fixed inKB5082052, KB5082060, KB5082063, KB5082123, KB5082126, KB5082127, KB5082142, KB5082198, KB5082200, KB5083768, KB5083769 (applies to 31 product versions) — build 10.0.14393.9060, 10.0.17763.8644+
Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2026-04-28 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2026-05-12.

How to patch

Manual download

For air-gapped servers or out-of-band deployment. Microsoft Update Catalog returns every OS-version variant of this update.

↗ Microsoft Update CatalogKB5082052

Manual remediation steps

Apply the Microsoft Security Update

Microsoft has released an official security update that fixes this vulnerability.

Required KB Updates

    1
    KB5082052 — https://support.microsoft.com/help/5082052
    1
    KB5082060 — https://support.microsoft.com/help/5082060
    1
    KB5082063 — https://support.microsoft.com/help/5082063
    1
    KB5082123 — https://support.microsoft.com/help/5082123
    1
    KB5082126 — https://support.microsoft.com/help/5082126
    1
    KB5082127 — https://support.microsoft.com/help/5082127
    1
    KB5082142 — https://support.microsoft.com/help/5082142
    1
    KB5082198 — https://support.microsoft.com/help/5082198
    1
    KB5082200 — https://support.microsoft.com/help/5082200
    1
    KB5083768 — https://support.microsoft.com/help/5083768
    1
    KB5083769 — https://support.microsoft.com/help/5083769

Supersedes: KB5078734, KB5078740, KB5078752, KB5078766, KB5078774, KB5078775, KB5078883, KB5078885, KB5078938, KB5079466, KB5079473

Affected Products

    1
    Windows 10 Version 1607 for 32-bit Systems
    1
    Windows 10 Version 1607 for x64-based Systems
    1
    Windows 10 Version 1809 for 32-bit Systems
    1
    Windows 10 Version 1809 for x64-based Systems
    1
    Windows 10 Version 21H2 for 32-bit Systems
    1
    Windows 10 Version 21H2 for ARM64-based Systems
    1
    Windows 10 Version 21H2 for x64-based Systems
    1
    Windows 10 Version 22H2 for 32-bit Systems
    1
    Windows 10 Version 22H2 for ARM64-based Systems
    1
    Windows 10 Version 22H2 for x64-based Systems
    1
    Windows 11 Version 23H2 for ARM64-based Systems
    1
    Windows 11 Version 23H2 for x64-based Systems
    1
    Windows 11 Version 24H2 for ARM64-based Systems
    1
    Windows 11 Version 24H2 for x64-based Systems
    1
    Windows 11 Version 25H2 for ARM64-based Systems
    1
    Windows 11 Version 25H2 for x64-based Systems
    1
    Windows 11 Version 26H1 for ARM64-based Systems
    1
    Windows 11 version 26H1 for x64-based Systems
    1
    Windows Server 2012
    1
    Windows Server 2012 (Server Core installation)
    1
    (…11 more product versions)

Fixed Build Numbers

    1
    10.0.14393.9060
    1
    10.0.17763.8644
    1
    10.0.19044.7184
    1
    10.0.19045.7184
    1
    10.0.20348.5020
    1
    10.0.22631.6936
    1
    10.0.25398.2274
    1
    10.0.26100.32690
    1
    10.0.26100.8246
    1
    10.0.26200.8246
    1
    (…3 more builds)

Installation Methods

Windows Update (recommended)

1
Settings → Windows Update → Check for updates
2
The security update is offered if your system is in scope
3
Restart when prompted — a reboot IS required to complete the install

Microsoft Update Catalog (manual download)

1
Open https://catalog.update.microsoft.com
2
Search for KB5082052
3
Download the package matching your OS architecture and Windows build
4
Run the .msu installer with administrator privileges
5
Restart when prompted

WSUS / SCCM / Intune

Approve KB5082052 for the affected products in your update management console.

Microsoft Download Center Links

    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5082052
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5082060
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5082063
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5082123
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5082126
    1
    (…6 more)

Verification

Confirm the update is installed:

Get-HotFix | Where-Object { $_.HotFixID -in @('KB5082052','KB5082060','KB5082063','KB5082123','KB5082126','KB5082127','KB5082142','KB5082198','KB5082200','KB5083768','KB5083769') }

References

    1
    Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-32202
    1
    KB article: https://support.microsoft.com/help/5082052
    1
    KB article: https://support.microsoft.com/help/5082060
    1
    KB article: https://support.microsoft.com/help/5082063
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-32202
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-32202

Discovery Credit

Maor Dahan with Akamai

PowerShell automationComing soon

No tested PowerShell script for this entry yet. We’re prioritising automation based on user demand.

References

↗ CVE-2026-32202↗ MSRC Advisory↗ NVD↗ KBKB5082052