Microsoft · Security update · February 9, 2021

KB4601345: February 2021 cumulative update for Windows 10 1809

KB4601345, released February 9, 2021, fixes 28 CVEs across 5 products. 2 of them are being exploited (CVE-2020-1472); 2 on CISA KEV. Patch Radar priority: Patch now.

Patch now2 on CISA KEVKnown ransomware use3 publicly disclosed

CVEs closed

10 rated Critical

Exploited

CVE-2020-1472

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.9939

99th percentile

Priority of the 28 CVEs

Patch now 2
                                Urgent 12
                                High 7
                                Routine 7

Applies to

Product	Build after install
Windows 10 Version 1809 for 32-bit Systems	17763.1757
Windows 10 Version 1809 for ARM64-based Systems	17763.1757
Windows 10 Version 1809 for x64-based Systems	17763.1757
Windows Server 2019	17763.1757
Windows Server 2019 (Server Core installation)	17763.1757

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2020-1472	Windows Netlogon	Elevation of Privilege	10.0	0.9939	KEVRansomwareExploited
Patch now	CVE-2021-1732	Windows Kernel	Elevation of Privilege	7.8	0.7838	KEVRansomwareExploited
Urgent	CVE-2021-24086	Windows TCP/IP	Denial of Service	7.5	0.5896	More likely
Urgent	CVE-2021-24093	Microsoft Graphics Component	Remote Code Execution	8.8	0.4590	Exploitation Less Likely
Urgent	CVE-2021-24074	Windows TCP/IP	Remote Code Execution	9.8	0.2616	More likely
Urgent	CVE-2021-24094	Windows TCP/IP	Remote Code Execution	9.8	0.2214	More likely
Urgent	CVE-2021-24078	Role: DNS Server	Remote Code Execution	9.8	0.1189	More likely
Urgent	CVE-2021-24091	Microsoft Windows Codecs Library	Remote Code Execution	7.8	0.0338	Exploitation Less Likely
Urgent	CVE-2021-24077	Role: Windows Fax Service	Remote Code Execution	9.8	0.0287	Exploitation Less Likely
Urgent	CVE-2021-24081	Microsoft Windows Codecs Library	Remote Code Execution	7.8	0.0251	Exploitation Less Likely
Urgent	CVE-2021-1722	Role: Windows Fax Service	Remote Code Execution	8.1	0.0244	Exploitation Less Likely
Urgent	CVE-2021-24088	Windows Print Spooler Components	Remote Code Execution	8.8	0.0243	Exploitation Less Likely
Urgent	CVE-2021-1727	Windows Installer	Elevation of Privilege	7.8	0.0076	DisclosedMore likely
Urgent	CVE-2021-1698	Windows Kernel	Elevation of Privilege	7.8	0.0066	More likely
High	CVE-2021-1692	Windows Hyper-V	Denial of Service	7.7	0.0424	Exploitation Less Likely
High	CVE-2021-1734	Windows Remote Procedure Call	Information Disclosure	7.5	0.0381	Exploitation Less Likely
High	CVE-2021-24083	Windows Address Book	Remote Code Execution	7.8	0.0287	Exploitation Less Likely
High	CVE-2021-24096	Windows Kernel	Elevation of Privilege	7.8	0.0146	Exploitation Less Likely
High	CVE-2021-24103	Windows Event Tracing	Elevation of Privilege	7.8	0.0063	Exploitation Less Likely
High	CVE-2021-25195	Windows PKU2U	Elevation of Privilege	7.8	0.0063	Exploitation Less Likely
High	CVE-2021-24102	Windows Event Tracing	Elevation of Privilege	7.8	0.0055	Exploitation Less Likely
Routine	CVE-2021-24080	Windows Trust Verification API	Denial of Service	6.5	0.0305	Exploitation Less Likely
Routine	CVE-2021-24082	Windows PowerShell	Security Feature Bypass	4.3	0.0263	Exploitation Less Likely
Routine	CVE-2021-24098	Windows Console Driver	Denial of Service	5.5	0.0152	DisclosedExploitation Less Likely
Routine	CVE-2021-24076	Role: Windows Hyper-V	Information Disclosure	5.5	0.0095	Exploitation Less Likely

Released the same day

KB4493192
Microsoft Office Online Server, Office Online Server
KB4493194
Microsoft SharePoint Server 2019
KB4493195
Microsoft SharePoint Enterprise Server 2016
KB4493196
Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
KB4493204
Microsoft Office Web Apps Server 2013 Service Pack 1
KB4493210
Microsoft SharePoint Foundation 2013 Service Pack 1
KB4493211
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)
KB4493222
Microsoft Excel 2010 Service Pack 2 (32-bit editions), Microsoft Excel 2010 Service Pack 2 (64-bit editions)
KB4493223
Microsoft SharePoint Foundation 2010 Service Pack 2
KB4571787
Microsoft Exchange Server 2019 Cumulative Update 7
KB4571788
Microsoft Exchange Server 2016 Cumulative Update 18
KB4595460
Microsoft Dynamics 365 (on-premises) version 9.0

Vendor advisory

https://support.microsoft.com/help/4601345

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