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

5 rated Critical

Exploited

CVE-2020-0646

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.9922

99th percentile

Priority of the 34 CVEs

Patch now 2
                                Urgent 5
                                High 18
                                Routine 9

Applies to

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

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
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

Released the same day

KB4484217
Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
KB4484221
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB4484223
Office Online Server
KB4484227
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)
KB4484234
Microsoft Excel 2013 RT Service Pack 1, Microsoft Excel 2013 Service Pack 1 (32-bit editions), Microsoft Excel 2013 Service Pack 1 (64-bit editions)
KB4484236
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)
KB4484243
Microsoft Excel 2010 Service Pack 2 (32-bit editions), Microsoft Excel 2010 Service Pack 2 (64-bit editions)
KB4528760
Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems, Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems, Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems and 11 more
KB4532933
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems, Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems, Microsoft .NET Framework 4.8 on Windows Server 2016 and 1 more
KB4532935
Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems, Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems
KB4532936
Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems, Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems, Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)
KB4532938
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems, Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems and 3 more

Vendor advisory

https://support.microsoft.com/help/4534271

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/kb4534271">KB4534271 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.