Microsoft · Security update · February 9, 2021

KB4571788: February 2021 security update

KB4571788, released February 9, 2021, fixes 1 CVE in Microsoft Exchange Server 2016 Cumulative Update 18. None of them is reported as exploited. Patch Radar priority: Routine. The product is no longer supported.

RoutineUnsupported product

CVEs closed

None rated Critical

Exploited

None reported

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.0182

78th percentile

Applies to

Product
Microsoft Exchange Server 2016 Cumulative Update 18

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Routine	CVE-2021-1730	Microsoft Exchange Server	Spoofing	5.4	0.0182	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
KB4595460
Microsoft Dynamics 365 (on-premises) version 9.0
KB4595463
Microsoft Dynamics 365 (on-premises) version 8.2

Vendor advisory

https://support.microsoft.com/help/4571788

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