IRONSMITHINTEL
HIGHCVSS8.8
|
Actively Exploited
|CISA KEV|CVE-2024-29988|Auth: none — unauthenticated|Reboot: required|Manual only

KB5036892: Windows Server Security Update (April 2024)

Microsoft SmartScreen Prompt contains a security feature bypass vulnerability that allows an attacker to bypass the Mark of the Web (MotW) feature. This vulnerability can be chained with CVE-2023-38831 and CVE-2024-21412 to execute a malicious file.

Published Apr 9, 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 2024-05-21 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Software Vulnerability (CWE-693) (CWE-693) vulnerability in Microsoft SmartScreen Prompt. SmartScreen Prompt 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:

●IT Security
●Running windows 10 1809: v < 10.0.17763.5696; windows 10 21h2: v < 10.0.19044.4291; windows 10 22h2: v < 10.0.19045.4291; windows 11 21h2: v < 10.0.22000.2899; windows 11 22h2: v < 10.0.22621.3447; windows 11 23h2: v < 10.0.22631.3447; windows server 2019: v < 10.0.17763.5696; windows server 2022: v < 10.0.20348.2402; windows server 2022 23h2: v < 10.0.25398.830
Fixed inKB5036892, KB5036893, KB5036894, KB5036896, KB5036909, KB5036910 (applies to 20 product versions) — build 10.0.17763.5696, 10.0.19044.4291+
Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2024-04-30 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2024-05-21.

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 CatalogKB5036892

Manual remediation steps

Apply the Microsoft Security Update

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

Required KB Updates

    1
    KB5036892 — https://support.microsoft.com/help/5036892
    1
    KB5036893 — https://support.microsoft.com/help/5036893
    1
    KB5036894 — https://support.microsoft.com/help/5036894
    1
    KB5036896 — https://support.microsoft.com/help/5036896
    1
    KB5036909 — https://support.microsoft.com/help/5036909
    1
    KB5036910 — https://support.microsoft.com/help/5036910

Supersedes: KB5035845, KB5035849, KB5035853, KB5035854, KB5035856, KB5035857

Affected Products

    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 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 2019
    1
    Windows Server 2019 (Server Core installation)
    1
    Windows Server 2022
    1
    Windows Server 2022 (Server Core installation)
    1
    Windows Server 2022, 23H2 Edition (Server Core installation)

Fixed Build Numbers

    1
    10.0.17763.5696
    1
    10.0.19044.4291
    1
    10.0.19045.4291
    1
    10.0.20348.2402
    1
    10.0.22000.2899
    1
    10.0.22621.3447
    1
    10.0.22631.3447
    1
    10.0.25398.830

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 KB5036892
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 KB5036892 for the affected products in your update management console.

Microsoft Download Center Links

    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5036892
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5036893
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5036894
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5036896
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5036909
    1
    (…1 more)

Verification

Confirm the update is installed:

Get-HotFix | Where-Object { $_.HotFixID -in @('KB5036892','KB5036893','KB5036894','KB5036896','KB5036909','KB5036910') }

References

    1
    Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-29988
    1
    KB article: https://support.microsoft.com/help/5036892
    1
    KB article: https://support.microsoft.com/help/5036893
    1
    KB article: https://support.microsoft.com/help/5036894
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2024-29988
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-29988

Discovery Credit

Dmitrij Lenz and Vlad Stolyarov of Google's Threat Analysis Group, Peter Girnus (gothburz) of Trend Micro's Zero Day Initiative with Trend Micro

PowerShell automationComing soon

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

References

↗ CVE-2024-29988↗ MSRC Advisory↗ NVD↗ KBKB5036892