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
65
4 rated Critical
Exploited
2
CVE-2022-21882
Exploitation more likely
8
Vendor assessment
Highest EPSS
0.9279
99th percentile

Priority of the 65 CVEs

Patch now 2 Urgent 11 High 31 Routine 21

Applies to

ProductBuild after install
Windows 11 version 21H2 for ARM64-based Systems22000.434
Windows 11 version 21H2 for x64-based Systems22000.434

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
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
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