Microsoft · Security update · March 9, 2021

KB5000840: March 2021 security update

KB5000840, released March 9, 2021, fixes 27 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent1 publicly disclosed

CVEs closed

1 rated Critical

Exploited

None reported

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.1729

97th percentile

Priority of the 27 CVEs

Patch now 0
                                Urgent 3
                                High 19
                                Routine 5

Applies to

Product
Windows Server 2012
Windows Server 2012 (Server Core installation)

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Urgent	CVE-2021-26877	Role: DNS Server	Remote Code Execution	9.8	0.1729	More likely
Urgent	CVE-2021-26897	Role: DNS Server	Remote Code Execution	9.8	0.1164	More likely
Urgent	CVE-2021-26868	Microsoft Graphics Component	Elevation of Privilege	7.8	0.0308	More likely
High	CVE-2021-26896	Role: DNS Server	Denial of Service	7.5	0.0785	Exploitation Less Likely
High	CVE-2021-26894	Role: DNS Server	Remote Code Execution	9.8	0.0776	Exploitation Less Likely
High	CVE-2021-26895	Role: DNS Server	Remote Code Execution	9.8	0.0776	Exploitation Less Likely
High	CVE-2021-26893	Role: DNS Server	Remote Code Execution	9.8	0.0702	Exploitation Less Likely
High	CVE-2021-27063	Role: DNS Server	Denial of Service	7.5	0.0673	Exploitation Less Likely
High	CVE-2021-26861	Microsoft Graphics Component	Remote Code Execution	7.8	0.0289	Exploitation Less Likely
High	CVE-2021-26881	Windows Media	Remote Code Execution	7.5	0.0283	Exploitation Less Likely
High	CVE-2021-26882	Windows Remote Access API	Elevation of Privilege	7.8	0.0211	Exploitation Less Likely
High	CVE-2021-27077	Microsoft Graphics Component	Elevation of Privilege	7.8	0.0144	DisclosedExploitation Less Likely
High	CVE-2021-26862	Windows Installer	Elevation of Privilege	7.0	0.0125	Exploitation Less Likely
High	CVE-2021-26873	Windows User Profile Service	Elevation of Privilege	7.0	0.0115	Exploitation Less Likely
High	CVE-2021-26887	Windows Folder Redirection	Elevation of Privilege	7.8	0.0107	Exploitation Less Likely
High	CVE-2021-26899	Windows UPnP Device Host	Elevation of Privilege	7.8	0.0097	Exploitation Less Likely
High	CVE-2021-1640	Windows Print Spooler Components	Elevation of Privilege	7.8	0.0095	Exploitation Less Likely
High	CVE-2021-26898	Windows Event Tracing	Elevation of Privilege	7.8	0.0087	Exploitation Less Likely
High	CVE-2021-26875	Microsoft Graphics Component	Elevation of Privilege	7.8	0.0087	Exploitation Less Likely
High	CVE-2021-26878	Windows Print Spooler Components	Elevation of Privilege	7.8	0.0085	Exploitation Less Likely
High	CVE-2021-26901	Windows Event Tracing	Elevation of Privilege	7.8	0.0082	Exploitation Less Likely
High	CVE-2021-26872	Windows Event Tracing	Elevation of Privilege	7.8	0.0075	Exploitation Less Likely
Routine	CVE-2020-16996	Microsoft Windows	Security Feature Bypass	6.5	0.0237	Exploitation Less Likely
Routine	CVE-2021-26886	Windows User Profile Service	Denial of Service	6.1	0.0113	Exploitation Less Likely
Routine	CVE-2021-24107	Windows Event Tracing	Information Disclosure	5.5	0.0103	Exploitation Less Likely

Released the same day

KB3101541
Microsoft Business Productivity Servers 2010 Service Pack 2
KB4484376
Microsoft Visio 2010 Service Pack 2 (32-bit editions), Microsoft Visio 2010 Service Pack 2 (64-bit editions)
KB4486673
Microsoft Visio 2013 Service Pack 1 (32-bit editions), Microsoft Visio 2013 Service Pack 1 (64-bit editions)
KB4493151
Microsoft Visio 2016 (32-bit edition), Microsoft Visio 2016 (64-bit edition)
KB4493177
Microsoft SharePoint Foundation 2013 Service Pack 1
KB4493199
Microsoft SharePoint Enterprise Server 2016
KB4493224
Microsoft PowerPoint 2016 (32-bit edition), Microsoft PowerPoint 2016 (64-bit edition)
KB4493227
Microsoft PowerPoint 2013 RT Service Pack 1, Microsoft PowerPoint 2013 Service Pack 1 (32-bit editions), Microsoft PowerPoint 2013 Service Pack 1 (64-bit editions)
KB4493230
Microsoft SharePoint Server 2019
KB4493231
Microsoft SharePoint Server 2019
KB4493232
Microsoft SharePoint Enterprise Server 2016
KB4493238
Microsoft SharePoint Foundation 2013 Service Pack 1

Vendor advisory

https://support.microsoft.com/help/5000840

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