IRONSMITHINTEL
MEDIUMCVSS6.5
|
Actively Exploited
|CISA KEV|CVE-2024-43451|Auth: none — unauthenticated|Reboot: required|Manual only

KB5046612: Windows Server Security Update (November 2024)

Microsoft Windows contains an NTLMv2 hash spoofing vulnerability that could result in disclosing a user's NTLMv2 hash to an attacker via a file open operation. The attacker could then leverage this hash to impersonate that user.

Published Nov 12, 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. Federal agencies are required to remediate by 2024-12-03 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Software Vulnerability (CWE-73) (CWE-73) vulnerability in Microsoft Windows. 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 < 10.0.10240.20826; windows 10 1607: v < 10.0.14393.7515; windows 10 1809: v < 10.0.17763.6532; windows 10 21h2: v < 10.0.19044.5131; windows 10 22h2: v < 10.0.19045.5131; windows 11 22h2: v < 10.0.22621.4460; windows 11 23h2: v < 10.0.22631.4460; windows 11 24h2: v < 10.0.26100.2314; windows server 2008: -, r2; windows server 2012: -, r2; windows server 2016: v < 10.0.14393.7515; windows server 2019: v < 10.0.17763.6532; windows server 2022: v < 10.0.20348.2849; windows server 2022 23h2: v < 10.0.25398.1251; windows server 2025: v < 10.0.26100.2314
Fixed inKB5046612, KB5046613, KB5046615, KB5046616, KB5046617, KB5046618, KB5046630, KB5046633, KB5046639, KB5046661, KB5046665, KB5046682, KB5046687, KB5046696, KB5046698, KB5046705 (applies to 35 product versions) — build 1.001, 10.0.10240.20826+
Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2024-11-12 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2024-12-03.

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 CatalogKB5046612

Manual remediation steps

Apply the Microsoft Security Update

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

Required KB Updates

    1
    KB5046612 — https://support.microsoft.com/help/5046612
    1
    KB5046613 — https://support.microsoft.com/help/5046613
    1
    KB5046615 — https://support.microsoft.com/help/5046615
    1
    KB5046616 — https://support.microsoft.com/help/5046616
    1
    KB5046617 — https://support.microsoft.com/help/5046617
    1
    KB5046618 — https://support.microsoft.com/help/5046618
    1
    KB5046630 — https://support.microsoft.com/help/5046630
    1
    KB5046633 — https://support.microsoft.com/help/5046633
    1
    KB5046639 — https://support.microsoft.com/help/5046639
    1
    KB5046661 — https://support.microsoft.com/help/5046661
    1
    KB5046665 — https://support.microsoft.com/help/5046665
    1
    KB5046682 — https://support.microsoft.com/help/5046682
    1
    KB5046687 — https://support.microsoft.com/help/5046687
    1
    KB5046696 — https://support.microsoft.com/help/5046696
    1
    KB5046698 — https://support.microsoft.com/help/5046698
    1
    KB5046705 — https://support.microsoft.com/help/5046705

Supersedes: KB5044273, KB5044277, KB5044281, KB5044284, KB5044285, KB5044286, KB5044288, KB5044293, KB5044320, KB5044343, KB5044356

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 Server 2008 R2 for x64-based Systems Service Pack 1
    1
    Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
    1
    (…15 more product versions)

Fixed Build Numbers

    1
    1.001
    1
    10.0.10240.20826
    1
    10.0.14393.7515
    1
    10.0.17763.6532
    1
    10.0.19044.5131
    1
    10.0.19045.5131
    1
    10.0.20348.2819
    1
    10.0.20348.2849
    1
    10.0.22621.4460
    1
    10.0.22631.4460
    1
    (…6 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 KB5046612
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 KB5046612 for the affected products in your update management console.

Microsoft Download Center Links

    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5046612
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5046613
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5046615
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5046616
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5046617
    1
    (…11 more)

Verification

Confirm the update is installed:

Get-HotFix | Where-Object { $_.HotFixID -in @('KB5046612','KB5046613','KB5046615','KB5046616','KB5046617','KB5046618','KB5046630','KB5046633','KB5046639','KB5046661','KB5046665','KB5046682','KB5046687','KB5046696','KB5046698','KB5046705') }

References

    1
    Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451
    1
    KB article: https://support.microsoft.com/help/5046612
    1
    KB article: https://support.microsoft.com/help/5046613
    1
    KB article: https://support.microsoft.com/help/5046615
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2024-43451
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-43451

Discovery Credit

Israel Yeshurun with ClearSky Cyber Security

PowerShell automationComing soon

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

References

↗ CVE-2024-43451↗ MSRC Advisory↗ NVD↗ KBKB5046612