IRONSMITHINTEL
HIGHCVSS8.1
|
Actively Exploited
|CISA KEV|CVE-2022-26925|Auth: none — unauthenticated|Reboot: required|Manual only

KB5013941: Windows Server Security Update (May 2022)

Microsoft Windows Local Security Authority (LSA) contains a spoofing vulnerability where an attacker can coerce the domain controller to authenticate to the attacker using NTLM.

Published May 10, 2022 · Updated May 16, 2026
Why patchRisk explained in plain English
Worst-case scenarioIf unpatched

A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2022-07-22 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Missing Authentication for Critical Function (CWE-306) vulnerability in Microsoft Windows. Exploitation requires remote network access, higher attack complexity, no authentication required, and no 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 1507: v < 10.0.10240.19297; windows 10 1607: v < 10.0.14393.5125; windows 10 1809: v < 10.0.17763.2928; windows 10 1909: v < 10.0.18363.2274; windows 10 20h2: v < 10.0.19042.1706; windows 10 21h1: v < 10.0.19043.1706; windows 10 21h2: v < 10.0.19044.1706; windows 11 21h2: v < 10.0.22000.675; windows 7: -; windows 8.1: -; windows rt 8.1: -; windows server 2008: -, r2; windows server 2012: -, r2; windows server 2016: v < 10.0.14393.5125; windows server 2019: v < 10.0.17763.2928; windows server 2022: v < 10.0.20348.707; windows server 20h2: v < 10.0.19042.1706
Fixed inKB5013941, KB5013942, KB5013943, KB5013944, KB5013945, KB5013952, KB5013963, KB5013999, KB5014001, KB5014006, KB5014010, KB5014011, KB5014012, KB5014017, KB5014018, KB5014025 (applies to 42 product versions) — build 10.0.10240.19297, 10.0.14393.5125+
Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2022-07-01 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2022-07-22.

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 CatalogKB5013941

Manual remediation steps

Apply the Microsoft Security Update

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

Required KB Updates

    1
    KB5013941 — https://support.microsoft.com/help/5013941
    1
    KB5013942 — https://support.microsoft.com/help/5013942
    1
    KB5013943 — https://support.microsoft.com/help/5013943
    1
    KB5013944 — https://support.microsoft.com/help/5013944
    1
    KB5013945 — https://support.microsoft.com/help/5013945
    1
    KB5013952 — https://support.microsoft.com/help/5013952
    1
    KB5013963 — https://support.microsoft.com/help/5013963
    1
    KB5013999 — https://support.microsoft.com/help/5013999
    1
    KB5014001 — https://support.microsoft.com/help/5014001
    1
    KB5014006 — https://support.microsoft.com/help/5014006
    1
    KB5014010 — https://support.microsoft.com/help/5014010
    1
    KB5014011 — https://support.microsoft.com/help/5014011
    1
    KB5014012 — https://support.microsoft.com/help/5014012
    1
    KB5014017 — https://support.microsoft.com/help/5014017
    1
    KB5014018 — https://support.microsoft.com/help/5014018
    1
    KB5014025 — https://support.microsoft.com/help/5014025

Supersedes: KB5012591, KB5012592, KB5012596, KB5012599, KB5012604, KB5012626, KB5012647, KB5012650, KB5012653, KB5012658, KB5012670

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 ARM64-based Systems
    1
    Windows 10 Version 1809 for x64-based Systems
    1
    Windows 10 Version 1909 for 32-bit Systems
    1
    Windows 10 Version 1909 for ARM64-based Systems
    1
    Windows 10 Version 1909 for x64-based Systems
    1
    Windows 10 Version 20H2 for 32-bit Systems
    1
    Windows 10 Version 20H2 for ARM64-based Systems
    1
    Windows 10 Version 21H1 for 32-bit Systems
    1
    Windows 10 Version 21H1 for ARM64-based Systems
    1
    Windows 10 Version 21H1 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 for 32-bit Systems
    1
    Windows 10 for x64-based Systems
    1
    Windows 11 version 21H2 for ARM64-based Systems
    1
    Windows 11 version 21H2 for x64-based Systems
    1
    (…22 more product versions)

Fixed Build Numbers

    1
    10.0.10240.19297
    1
    10.0.14393.5125
    1
    10.0.17763.2928
    1
    10.0.18363.2274
    1
    10.0.19042.1706
    1
    10.0.19043.1706
    1
    10.0.19044.1706
    1
    10.0.20348.707
    1
    10.0.22000.675
    1
    6.0.6003.21481
    1
    (…5 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 KB5013941
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 KB5013941 for the affected products in your update management console.

Microsoft Download Center Links

    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5013941
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5013942
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5013943
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5013944
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5013945
    1
    (…11 more)

Verification

Confirm the update is installed:

Get-HotFix | Where-Object { $_.HotFixID -in @('KB5013941','KB5013942','KB5013943','KB5013944','KB5013945','KB5013952','KB5013963','KB5013999','KB5014001','KB5014006','KB5014010','KB5014011','KB5014012','KB5014017','KB5014018','KB5014025') }

References

    1
    Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-26925
    1
    KB article: https://support.microsoft.com/help/5013941
    1
    KB article: https://support.microsoft.com/help/5013942
    1
    KB article: https://support.microsoft.com/help/5013943
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2022-26925
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26925

Discovery Credit

Raphael John with Bertelsmann Printing Group

PowerShell automationComing soon

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

References

↗ CVE-2022-26925↗ MSRC Advisory↗ NVD↗ KBKB5013941