Microsoft · Security update · January 14, 2020

KB4534271: January 2020 cumulative update for Windows 10 1607

KB4534271, released January 14, 2020, fixes 34 CVEs across 13 products. 2 of them are being exploited (CVE-2020-0646); 2 on CISA KEV. Patch Radar priority: Patch now.

Patch now2 on CISA KEV
CVEs closed
34
5 rated Critical
Exploited
2
CVE-2020-0646
Exploitation more likely
1
Vendor assessment
Highest EPSS
0.9922
99th percentile

Priority of the 34 CVEs

Patch now 2 Urgent 5 High 18 Routine 9

Applies to

ProductBuild after install
Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems14393.3443
Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems14393.3443
Internet Explorer 11 on Windows Server 201614393.3443
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems14393.3443
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems14393.3443
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 201614393.3443
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)14393.3443
Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems14393.3443
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems14393.3443
Windows 10 Version 1607 for 32-bit Systems14393.3443
Windows 10 Version 1607 for x64-based Systems14393.3443
Windows Server 201614393.3443
Windows Server 2016 (Server Core installation)14393.3443

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
Patch now CVE-2020-0646 .NET Framework Remote Code Execution n/a 0.9922 KEVExploited
Patch now CVE-2020-0601 Microsoft Windows Spoofing 8.1 0.8908 KEVExploited
Urgent CVE-2020-0609 Windows RDP Remote Code Execution 9.8 0.7768 N/A
Urgent CVE-2020-0610 Windows RDP Remote Code Execution 9.8 0.6757 N/A
Urgent CVE-2020-0606 .NET Framework Remote Code Execution n/a 0.1834 Exploitation Less Likely
Urgent CVE-2020-0611 Windows RDP Remote Code Execution 7.5 0.0718 Exploitation Less Likely
Urgent CVE-2020-0634 Common Log File System Driver Elevation of Privilege 7.8 0.0132 More likely
High CVE-2020-0612 Windows RDP Denial of Service 7.5 0.0488 N/A
High CVE-2020-0642 Microsoft Graphics Component Elevation of Privilege 7.8 0.0161 Exploitation Less Likely
High CVE-2020-0635 Microsoft Windows Elevation of Privilege 7.8 0.0113 Exploitation Less Likely
High CVE-2020-0641 Windows Media Elevation of Privilege 7.8 0.0099 Exploitation Less Likely
High CVE-2020-0644 Microsoft Windows Elevation of Privilege 7.8 0.0093 Exploitation Less Likely
High CVE-2020-0613 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0091 Exploitation Less Likely
High CVE-2020-0633 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0087 Exploitation Less Likely
High CVE-2020-0614 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0086 Exploitation Less Likely
High CVE-2020-0623 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0086 Exploitation Less Likely
High CVE-2020-0625 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0086 Exploitation Less Likely
High CVE-2020-0627 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0086 Exploitation Less Likely
High CVE-2020-0628 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0086 Exploitation Less Likely
High CVE-2020-0631 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0081 Exploitation Less Likely
High CVE-2020-0620 Microsoft Windows Elevation of Privilege 7.8 0.0080 Exploitation Less Likely
High CVE-2020-0626 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0080 Exploitation Less Likely
High CVE-2020-0629 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0080 Exploitation Less Likely
High CVE-2020-0630 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0080 Exploitation Less Likely
High CVE-2020-0632 Microsoft Windows Search Component Elevation of Privilege 7.8 0.0080 Exploitation Less Likely
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