Microsoft · Security update · January 12, 2021

KB4598285: January 2021 security update

KB4598285, released January 12, 2021, fixes 42 CVEs across 5 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent1 publicly disclosed

CVEs closed

7 rated Critical

Exploited

None reported

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.0470

91st percentile

Priority of the 42 CVEs

Patch now 0
                                Urgent 8
                                High 25
                                Routine 9

Applies to

Product
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows RT 8.1
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
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-2021-1709	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-2021-1671	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-2021-1695	Windows Print Spooler Components	Elevation of Privilege	7.8	0.0087	Exploitation Less Likely
High	CVE-2021-1661	Windows Installer	Elevation of Privilege	7.8	0.0083	Exploitation Less Likely
High	CVE-2021-1650	Microsoft Windows	Elevation of Privilege	7.8	0.0081	Exploitation Less Likely
High	CVE-2021-1649	Microsoft Windows	Elevation of Privilege	7.8	0.0079	Exploitation Less Likely

Released the same day

KB4486683
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB4486724
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB4486736
Excel Services on Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB4486755
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB4486759
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)
KB4486762
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)
KB4486764
Microsoft Word 2013 RT Service Pack 1, Microsoft Word 2013 Service Pack 1 (32-bit editions), Microsoft Word 2013 Service Pack 1 (64-bit editions)
KB4493142
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)
KB4493143
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)
KB4493145
Microsoft Word 2010 Service Pack 2 (32-bit editions), Microsoft Word 2010 Service Pack 2 (64-bit editions)
KB4493156
Microsoft Word 2016 (32-bit edition), Microsoft Word 2016 (64-bit edition)
KB4493160
Microsoft Office Online Server

Vendor advisory

https://support.microsoft.com/help/4598285

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