Microsoft · Security update · May 11, 2021

KB5003203: May 2021 security update

KB5003203, released May 11, 2021, fixes 11 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

2 rated Critical

Exploited

None reported

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.3923

98th percentile

Priority of the 11 CVEs

Patch now 0
                                Urgent 3
                                High 3
                                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-2021-28476	Role: Windows Hyper-V	Remote Code Execution	9.9	0.3923	Exploitation Less Likely
Urgent	CVE-2021-31194	Windows OLE	Remote Code Execution	8.8	0.0235	Exploitation Less Likely
Urgent	CVE-2021-31188	Microsoft Graphics Component	Elevation of Privilege	7.8	0.0137	More likely
High	CVE-2021-31186	Windows RDP Client	Information Disclosure	7.4	0.0297	Exploitation Less Likely
High	CVE-2021-28455	Jet Red and Access Connectivity	Remote Code Execution	8.8	0.0212	Exploitation Less Likely
High	CVE-2021-31193	Windows SSDP Service	Elevation of Privilege	7.8	0.0052	Exploitation Less Likely
Routine	CVE-2020-26144	Windows Wireless Networking	Spoofing	6.5	0.0491	Exploitation Less Likely
Routine	CVE-2020-24588	Windows Wireless Networking	Spoofing	6.5	0.0361	Exploitation Less Likely
Routine	CVE-2020-24587	Windows Wireless Networking	Information Disclosure	6.5	0.0259	Exploitation Less Likely
Routine	CVE-2021-31184	Microsoft Windows IrDA	Information Disclosure	5.5	0.0156	Exploitation Less Likely
Routine	CVE-2021-28479	Windows CSC Service	Information Disclosure	5.5	0.0076	Exploitation Less Likely

Released the same day

KB4464542
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)
KB4484527
Microsoft Access 2013 Service Pack 1 (32-bit editions), Microsoft Access 2013 Service Pack 1 (64-bit editions)
KB4493197
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB4493206
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)
KB4504711
Microsoft Access 2016 (32-bit edition), Microsoft Access 2016 (64-bit edition)
KB5001914
Microsoft Office Online Server
KB5001916
Microsoft SharePoint Server 2019
KB5001917
Microsoft SharePoint Enterprise Server 2016
KB5001918
Microsoft Excel 2016 (32-bit edition), Microsoft Excel 2016 (64-bit edition)
KB5001919
Microsoft Word 2016 (32-bit edition), Microsoft Word 2016 (64-bit edition)
KB5001920
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)
KB5001923
Microsoft Office 2016 (32-bit edition), Microsoft Office 2016 (64-bit edition)

Vendor advisory

https://support.microsoft.com/help/5003203

For tools and AI agents

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