Microsoft · Security update · July 13, 2021

KB5003611: July 2021 security update

KB5003611, released July 13, 2021, fixes 1 CVE in Microsoft Exchange Server 2016 Cumulative Update 21. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

HighUnsupported product

CVEs closed

None rated Critical

Exploited

None reported

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.0438

91st percentile

Applies to

Product
Microsoft Exchange Server 2016 Cumulative Update 21

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
High	CVE-2021-34470	Microsoft Exchange Server	Elevation of Privilege	8.0	0.0438	Exploitation Less Likely

Released the same day

KB5001949
Microsoft Word 2016 (32-bit edition), Microsoft Word 2016 (64-bit edition)
KB5001973
Microsoft Office Online Server
KB5001975
Microsoft SharePoint Server 2019
KB5001976
Microsoft SharePoint Enterprise Server 2016
KB5001977
Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
KB5001979
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB5001981
Microsoft SharePoint Enterprise Server 2016
KB5001983
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)
KB5001984
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB5001986
Microsoft Office Web Apps Server 2013 Service Pack 1
KB5001992
Microsoft SharePoint Foundation 2013 Service Pack 1
KB5001993
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)

Vendor advisory

https://support.microsoft.com/help/5003611

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