Microsoft · Security update · January 12, 2021

KB4598243: January 2021 cumulative update for Windows 10 1607

KB4598243, released January 12, 2021, fixes 55 CVEs across 7 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent1 publicly disclosed
CVEs closed
55
8 rated Critical
Exploited
0
None reported
Exploitation more likely
1
Vendor assessment
Highest EPSS
0.0785
94th percentile

Priority of the 55 CVEs

Patch now 0 Urgent 9 High 36 Routine 10

Applies to

ProductBuild after install
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems14393.4169
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems14393.4169
Microsoft Edge (EdgeHTML-based) on Windows Server 201614393.4169
Windows 10 Version 1607 for 32-bit Systems14393.4169
Windows 10 Version 1607 for x64-based Systems14393.4169
Windows Server 201614393.4169
Windows Server 2016 (Server Core installation)14393.4169

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
Urgent CVE-2021-1665 Microsoft Graphics Component Remote Code Execution 7.8 0.0406 Exploitation Less Likely
Urgent CVE-2021-1668 Microsoft DTV-DVD Video Decoder Remote Code Execution 7.8 0.0392 Exploitation Less Likely
Urgent CVE-2021-1667 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0387 Exploitation Less Likely
Urgent CVE-2021-1658 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0320 Exploitation Less Likely
Urgent CVE-2021-1660 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0320 Exploitation Less Likely
Urgent CVE-2021-1666 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0320 Exploitation Less Likely
Urgent CVE-2021-1673 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0320 Exploitation Less Likely
Urgent CVE-2021-1705 Microsoft Edge (HTML-based) Remote Code Execution 4.2 0.0207 Exploitation Less Likely
Urgent CVE-2021-1709 Microsoft Graphics Component Elevation of Privilege 7.0 0.0079 More likely
High CVE-2021-1692 Windows Hyper-V Denial of Service 7.7 0.0424 Exploitation Less Likely
High CVE-2021-1700 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0387 Exploitation Less Likely
High CVE-2021-1701 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0387 Exploitation Less Likely
High CVE-2021-1694 Windows Update Stack Elevation of Privilege 7.5 0.0351 Exploitation Less Likely
High CVE-2021-1710 Windows Media Remote Code Execution 7.8 0.0322 Exploitation Less Likely
High CVE-2021-1664 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0320 Exploitation Less Likely
High CVE-2021-1669 Windows Remote Desktop Security Feature Bypass 8.8 0.0320 Exploitation Less Likely
High CVE-2021-1671 Windows Remote Procedure Call Runtime Remote Code Execution 8.8 0.0320 Exploitation Less Likely
High CVE-2021-1674 Windows Remote Desktop Security Feature Bypass 8.8 0.0320 Exploitation Less Likely
High CVE-2021-1706 Microsoft Windows Elevation of Privilege 7.3 0.0225 Exploitation Less Likely
High CVE-2021-1648 Windows splwow64 Elevation of Privilege 7.8 0.0125 DisclosedExploitation Less Likely
High CVE-2018-8455 Windows Kernel Elevation of Privilege 7.0 0.0109 Exploitation Less Likely
High CVE-2021-1704 Windows Hyper-V Elevation of Privilege 7.3 0.0103 Exploitation Less Likely
High CVE-2021-1657 Microsoft Windows Remote Code Execution 7.8 0.0095 Exploitation Less Likely
High CVE-2021-1685 Windows AppX Deployment Extensions Elevation of Privilege 7.3 0.0094 Exploitation Less Likely
High CVE-2021-1695 Windows Print Spooler Components Elevation of Privilege 7.8 0.0087 Exploitation Less Likely
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