IRONSMITHINTEL
HIGHCVSS7.8
|
Actively Exploited
|CISA KEV|CVE-2024-38193|Auth: low — authenticated user|Reboot: required|Manual only

KB5041160: Windows Server Security Update (August 2024)

Microsoft Windows Ancillary Function Driver for WinSock contains an unspecified vulnerability that allows for privilege escalation, enabling a local attacker to gain SYSTEM privileges.

Published Aug 13, 2024 · Updated May 16, 2026
Why patchRisk explained in plain English
Worst-case scenarioIf unpatched

A local attacker, with a low-privilege account, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2024-09-03 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Use After Free (CWE-416) vulnerability in Microsoft Windows. Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability Exploitation requires local access, low attack complexity, a low-privilege authenticated account, and no user interaction required.

Am I affected?Quick check

Probably yes if any of these apply:

●Windows Administrators
●Systems Engineers
●IT Security
●Running windows 10 1507: v < 10.0.10240.20751; windows 10 1607: v < 10.0.14393.7259; windows 10 1809: v < 10.0.17763.6189; windows 10 21h2: v < 10.0.19044.4780; windows 10 22h2: v < 10.0.19045.4780; windows 11 21h2: v < 10.0.22000.3147; windows 11 22h2: v < 10.0.22621.4037; windows 11 23h2: v < 10.0.22631.4037; windows 11 24h2: v < 10.0.26100.1457; windows server 2008: -, r2; windows server 2012: v < 6.2.9200.25031, r2; windows server 2016: v < 10.0.14393.7259; windows server 2019: v < 10.0.17763.6189; windows server 2022: v < 10.0.20348.2655; windows server 2022 23h2: v < 10.0.25398.1085
Fixed inKB5041160, KB5041571, KB5041573, KB5041578, KB5041580, KB5041585, KB5041592, KB5041773, KB5041782, KB5041823, KB5041828, KB5041838, KB5041847, KB5041850, KB5041851 (applies to 37 product versions) — build 10.0.10240.20751, 10.0.14393.7259+
Real-world incidentsWhat we've seen

Active exploitation documented in the wild. Threat-research write-up: https://www.exploit-db.com/exploits/52284

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 CatalogKB5041160

Manual remediation steps

Apply the Microsoft Security Update

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

Required KB Updates

    1
    KB5041160 — https://support.microsoft.com/help/5041160
    1
    KB5041571 — https://support.microsoft.com/help/5041571
    1
    KB5041573 — https://support.microsoft.com/help/5041573
    1
    KB5041578 — https://support.microsoft.com/help/5041578
    1
    KB5041580 — https://support.microsoft.com/help/5041580
    1
    KB5041585 — https://support.microsoft.com/help/5041585
    1
    KB5041592 — https://support.microsoft.com/help/5041592
    1
    KB5041773 — https://support.microsoft.com/help/5041773
    1
    KB5041782 — https://support.microsoft.com/help/5041782
    1
    KB5041823 — https://support.microsoft.com/help/5041823
    1
    KB5041828 — https://support.microsoft.com/help/5041828
    1
    KB5041838 — https://support.microsoft.com/help/5041838
    1
    KB5041847 — https://support.microsoft.com/help/5041847
    1
    KB5041850 — https://support.microsoft.com/help/5041850
    1
    KB5041851 — https://support.microsoft.com/help/5041851

Supersedes: KB5040427, KB5040430, KB5040431, KB5040434, KB5040435, KB5040437, KB5040438, KB5040442, KB5040448, KB5040456, KB5040485, KB5040497, KB5040499

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

Fixed Build Numbers

    1
    10.0.10240.20751
    1
    10.0.14393.7259
    1
    10.0.17763.6189
    1
    10.0.19044.4780
    1
    10.0.19045.4780
    1
    10.0.20348.2655
    1
    10.0.22000.3147
    1
    10.0.22621.4037
    1
    10.0.22631.4037
    1
    10.0.25398.1085
    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 KB5041160
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 KB5041160 for the affected products in your update management console.

Microsoft Download Center Links

    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5041160
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5041571
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5041573
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5041578
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5041580
    1
    (…10 more)

Verification

Confirm the update is installed:

Get-HotFix | Where-Object { $_.HotFixID -in @('KB5041160','KB5041571','KB5041573','KB5041578','KB5041580','KB5041585','KB5041592','KB5041773','KB5041782','KB5041823','KB5041828','KB5041838','KB5041847','KB5041850','KB5041851') }

References

    1
    Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38193
    1
    KB article: https://support.microsoft.com/help/5041160
    1
    KB article: https://support.microsoft.com/help/5041571
    1
    KB article: https://support.microsoft.com/help/5041573
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2024-38193
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38193

Discovery Credit

Luigino Camastra and Milánek with Gen Digital

PowerShell automationComing soon

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

References

↗ CVE-2024-38193↗ MSRC Advisory↗ NVD↗ KBKB5041160