IRONSMITHINTEL
HIGHCVSS8.8
|
Actively Exploited
|CISA KEV|CVE-2024-30040|Auth: none — unauthenticated|Reboot: required|Manual only

KB5037763: Windows Server Security Update (May 2024)

Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for a security feature bypass.

Published May 14, 2024 · 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 2024-06-04 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Improper Input Validation (CWE-20) vulnerability in Microsoft Windows. Windows MSHTML Platform Security Feature Bypass Vulnerability 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 1507: v < 10.0.10240.20651; windows 10 1607: v < 10.0.14393.6981; windows 10 1809: v < 10.0.17763.5820; windows 10 21h2: v < 10.0.19044.4412; windows 10 22h2: v < 10.0.19045.4412; windows 11 21h2: v < 10.0.22000.2960; windows 11 22h2: v < 10.0.22621.3593; windows 11 23h2: v < 10.0.22631.3593; windows server 2016: v < 10.0.14393.6981; windows server 2019: v < 10.0.17763.5820; windows server 2022: v < 10.0.20348.2458; windows server 2022 23h2: v < 10.0.25398.887
Fixed inKB5037763, KB5037765, KB5037768, KB5037770, KB5037771, KB5037781, KB5037782, KB5037788, KB5037848 (applies to 26 product versions) — build 10.0.10240.20651, 10.0.14393.6981+
Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2024-05-14 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2024-06-04.

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 CatalogKB5037763

Manual remediation steps

Apply the Microsoft Security Update

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

Required KB Updates

    1
    KB5037763 — https://support.microsoft.com/help/5037763
    1
    KB5037765 — https://support.microsoft.com/help/5037765
    1
    KB5037768 — https://support.microsoft.com/help/5037768
    1
    KB5037770 — https://support.microsoft.com/help/5037770
    1
    KB5037771 — https://support.microsoft.com/help/5037771
    1
    KB5037781 — https://support.microsoft.com/help/5037781
    1
    KB5037782 — https://support.microsoft.com/help/5037782
    1
    KB5037788 — https://support.microsoft.com/help/5037788
    1
    KB5037848 — https://support.microsoft.com/help/5037848

Supersedes: KB5036892, KB5036893, KB5036894, KB5036896, KB5036899, KB5036909, KB5036910, KB5036925

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 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 21H2 for ARM64-based Systems
    1
    Windows 11 version 21H2 for x64-based Systems
    1
    Windows Server 2016
    1
    (…6 more product versions)

Fixed Build Numbers

    1
    10.0.10240.20651
    1
    10.0.14393.6981
    1
    10.0.17763.5820
    1
    10.0.19044.4412
    1
    10.0.19045.4412
    1
    10.0.20348.2458
    1
    10.0.20348.2461
    1
    10.0.22000.2960
    1
    10.0.22621.3593
    1
    10.0.22631.3593
    1
    (…1 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 KB5037763
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 KB5037763 for the affected products in your update management console.

Microsoft Download Center Links

    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5037763
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5037765
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5037768
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5037770
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5037771
    1
    (…4 more)

Verification

Confirm the update is installed:

Get-HotFix | Where-Object { $_.HotFixID -in @('KB5037763','KB5037765','KB5037768','KB5037770','KB5037771','KB5037781','KB5037782','KB5037788','KB5037848') }

References

    1
    Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-30040
    1
    KB article: https://support.microsoft.com/help/5037763
    1
    KB article: https://support.microsoft.com/help/5037765
    1
    KB article: https://support.microsoft.com/help/5037768
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2024-30040
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-30040
PowerShell automationComing soon

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

References

↗ CVE-2024-30040↗ MSRC Advisory↗ NVD↗ KBKB5037763