IRONSMITHINTEL
HIGHCVSS7.8
|
Actively Exploited
|CISA KEV|CVE-2022-34713|Auth: none — unauthenticated|Reboot: required|Manual only

KB5016616: Windows Server Security Update (August 2022)

A remote code execution vulnerability exists when Microsoft Windows MSDT is called using the URL protocol from a calling application.

Published Aug 9, 2022 · Updated May 16, 2026
Why patchRisk explained in plain English
Worst-case scenarioIf unpatched

A local 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 2022-08-30 under CISA BOD 22-01.

How the attack worksNo clicks needed

This vulnerability affects Microsoft Windows. Exploitation requires local access, low attack complexity, no authentication required, and 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 < 10.0.10240.19387; windows 10 1607: v < 10.0.14393.5291; windows 10 1809: v < 10.0.17763.3287; windows 10 20h2: v < 10.0.19042.1889; windows 10 21h1: v < 10.0.19043.1889; windows 10 21h2: v < 10.0.19044.1889; windows 11 21h2: v < 10.0.22000.856; windows 7: -; windows 8.1: -; windows rt 8.1: -; windows server 2008: r2; windows server 2012: -, r2; windows server 2016: v < 10.0.14393.5291; windows server 2019: v < 10.0.17763.3287; windows server 2022: v < 10.0.20348.887; windows server 20h2: v < 10.0.19042.1889
Fixed inKB5016616, KB5016622, KB5016623, KB5016627, KB5016629, KB5016639, KB5016672, KB5016676, KB5016679, KB5016681, KB5016683, KB5016684 (applies to 35 product versions) — build 10.0.10240.19387, 10.0.14393.5291+
Real-world incidentsWhat we've seen

CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2022-08-09 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2022-08-30.

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 CatalogKB5016616

Manual remediation steps

Apply the Microsoft Security Update

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

Required KB Updates

    1
    KB5016616 — https://support.microsoft.com/help/5016616
    1
    KB5016622 — https://support.microsoft.com/help/5016622
    1
    KB5016623 — https://support.microsoft.com/help/5016623
    1
    KB5016627 — https://support.microsoft.com/help/5016627
    1
    KB5016629 — https://support.microsoft.com/help/5016629
    1
    KB5016639 — https://support.microsoft.com/help/5016639
    1
    KB5016672 — https://support.microsoft.com/help/5016672
    1
    KB5016676 — https://support.microsoft.com/help/5016676
    1
    KB5016679 — https://support.microsoft.com/help/5016679
    1
    KB5016681 — https://support.microsoft.com/help/5016681
    1
    KB5016683 — https://support.microsoft.com/help/5016683
    1
    KB5016684 — https://support.microsoft.com/help/5016684

Supersedes: KB5015807, KB5015808, KB5015811, KB5015814, KB5015827, KB5015832, KB5015861, KB5015863, KB5015874

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 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
    Windows 7 for 32-bit Systems Service Pack 1
    1
    Windows 7 for x64-based Systems Service Pack 1
    1
    Windows 8.1 for 32-bit systems
    1
    (…15 more product versions)

Fixed Build Numbers

    1
    10.0.10240.19387
    1
    10.0.14393.5291
    1
    10.0.17763.3287
    1
    10.0.19042.1889
    1
    10.0.19043.1889
    1
    10.0.19044.1889
    1
    10.0.20348.887
    1
    10.0.22000.856
    1
    6.1.7601.26065
    1
    6.2.9200.23817
    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 KB5016616
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 KB5016616 for the affected products in your update management console.

Microsoft Download Center Links

    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5016616
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5016622
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5016623
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5016627
    1
    https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB5016629
    1
    (…7 more)

Verification

Confirm the update is installed:

Get-HotFix | Where-Object { $_.HotFixID -in @('KB5016616','KB5016622','KB5016623','KB5016627','KB5016629','KB5016639','KB5016672','KB5016676','KB5016679','KB5016681','KB5016683','KB5016684') }

References

    1
    Microsoft Security Response Center: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-34713
    1
    KB article: https://support.microsoft.com/help/5016616
    1
    KB article: https://support.microsoft.com/help/5016623
    1
    KB article: https://support.microsoft.com/help/5016627
    1
    NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2022-34713
    1
    CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-34713

Discovery Credit

Imre Rad

PowerShell automationComing soon

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

References

↗ CVE-2022-34713↗ MSRC Advisory↗ NVD↗ KBKB5016616