Microsoft · Security update · January 11, 2022

KB5009566: January 2022 cumulative update for Windows 11 21H2

KB5009566, released January 11, 2022, fixes 65 CVEs across 2 products. 2 of them are being exploited (CVE-2022-21882); 2 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

Patch now2 on CISA KEVKnown ransomware use5 publicly disclosedUnsupported product

CVEs closed

4 rated Critical

Exploited

CVE-2022-21882

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.9279

99th percentile

Priority of the 65 CVEs

Patch now 2
                                Urgent 11
                                High 31
                                Routine 21

Applies to

Product	Build after install
Windows 11 version 21H2 for ARM64-based Systems	22000.434
Windows 11 version 21H2 for x64-based Systems	22000.434

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2022-21882	Windows Win32K	Elevation of Privilege	7.0	0.5921	KEVRansomwareExploited
Patch now	CVE-2022-21919	Windows User Profile Service	Elevation of Privilege	7.0	0.0257	KEVDisclosedExploited
Urgent	CVE-2022-21907	Windows HTTP Protocol Stack	Remote Code Execution	9.8	0.9279	More likely
Urgent	CVE-2022-21881	Windows Kernel	Elevation of Privilege	7.0	0.2452	More likely
Urgent	CVE-2021-22947	Open Source Software	Remote Code Execution	6.1	0.0301	DisclosedExploitation Less Likely
Urgent	CVE-2022-21857	Windows Active Directory	Elevation of Privilege	8.8	0.0264	Exploitation Less Likely
Urgent	CVE-2022-21887	Windows Win32K	Elevation of Privilege	7.0	0.0112	More likely
Urgent	CVE-2022-21897	Windows Common Log File System Driver	Elevation of Privilege	7.8	0.0109	More likely
Urgent	CVE-2022-21916	Windows Common Log File System Driver	Elevation of Privilege	7.8	0.0100	More likely
Urgent	CVE-2022-21908	Windows Installer	Elevation of Privilege	7.8	0.0093	More likely
Urgent	CVE-2022-21885	Windows Remote Access Connection Manager	Elevation of Privilege	7.8	0.0069	More likely
Urgent	CVE-2022-21914	Windows Remote Access Connection Manager	Elevation of Privilege	7.8	0.0069	More likely
Urgent	CVE-2022-21833	Windows Virtual Machine IDE Drive	Elevation of Privilege	7.8	0.0065	Exploitation Less Likely
High	CVE-2022-21893	Windows RDP	Remote Code Execution	8.0	0.0863	Exploitation Less Likely
High	CVE-2022-21849	Windows IKE Extension	Remote Code Execution	9.8	0.0659	Exploitation Less Likely
High	CVE-2022-21883	Windows IKE Extension	Denial of Service	7.5	0.0464	Exploitation Less Likely
High	CVE-2022-21848	Windows IKE Extension	Denial of Service	7.5	0.0440	Exploitation Less Likely
High	CVE-2022-21880	Microsoft Graphics Component	Information Disclosure	7.5	0.0410	Exploitation Less Likely
High	CVE-2022-21843	Windows IKE Extension	Denial of Service	7.5	0.0356	Exploitation Less Likely
High	CVE-2022-21889	Windows IKE Extension	Denial of Service	7.5	0.0320	Exploitation Less Likely
High	CVE-2022-21890	Windows IKE Extension	Denial of Service	7.5	0.0320	Exploitation Less Likely
High	CVE-2022-21850	Windows RDP	Remote Code Execution	8.8	0.0294	Exploitation Less Likely
High	CVE-2022-21851	Windows RDP	Remote Code Execution	8.8	0.0294	Exploitation Less Likely
High	CVE-2022-21920	Windows Kerberos	Elevation of Privilege	8.8	0.0293	Exploitation Less Likely
High	CVE-2022-21922	Windows Remote Procedure Call Runtime	Remote Code Execution	8.8	0.0293	Exploitation Less Likely

Released the same day

KB4462205
Microsoft Office 2013 RT Service Pack 1, Microsoft Office 2013 Service Pack 1 (32-bit editions), Microsoft Office 2013 Service Pack 1 (64-bit editions)
KB5001995
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB5002052
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB5002057
Microsoft Word 2016 (32-bit edition), Microsoft Word 2016 (64-bit edition)
KB5002060
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB5002064
Microsoft Office 2013 RT Service Pack 1, Microsoft Office 2013 Service Pack 1 (32-bit editions), Microsoft Office 2013 Service Pack 1 (64-bit editions)
KB5002102
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB5002107
Microsoft Office Online Server
KB5002108
Microsoft SharePoint Server 2019
KB5002110
SharePoint Server Subscription Edition Language Pack
KB5002113
Microsoft SharePoint Enterprise Server 2016
KB5002114
Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)

Vendor advisory

https://support.microsoft.com/help/5009566

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/fix/microsoft/kb5009566">KB5009566 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Which machines still need it?

Patchblox reads the OS build on every Windows machine, from Intune, ConfigMgr or its own agent, and shows which ones are still below the fixed build.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.