Microsoft May 2021 Security Updates

May 2021 Security Updates
Updates this Month

This release consists of security updates for the following products, features and roles.

.NET Core & Visual Studio
HTTP.sys
Internet Explorer
Microsoft Accessibility Insights for Web
Microsoft Bluetooth Driver
Microsoft Dynamics Finance & Operations
Microsoft Exchange Server
Microsoft Graphics Component
Microsoft Office
Microsoft Office Access
Microsoft Office Excel
Microsoft Office SharePoint
Microsoft Office Word
Microsoft Windows Codecs Library
Microsoft Windows IrDA
Open Source Software
Role: Hyper-V
Skype for Business and Microsoft Lync
Visual Studio
Visual Studio Code
Windows Container Isolation FS Filter Driver
Windows Container Manager Service
Windows Cryptographic Services
Windows CSC Service
Windows Desktop Bridge
Windows OLE
Windows Projected File System FS Filter
Windows RDP Client
Windows SMB
Windows SSDP Service
Windows WalletService
Windows Wireless Networking




Please note the following information regarding the security updates:
Relevant Information
Windows 10 updates are cumulative. The monthly security release includes all security fixes for vulnerabilities that affect Windows 10, in addition to non-security updates. The updates are available via the Microsoft Update Catalog. For information on lifecycle and support dates for Windows 10 operating systems, please see Windows Lifecycle Facts Sheet.
Microsoft is improving Windows Release Notes. For more information, please see What's next for Windows release notes.
A list of the latest servicing stack updates for each operating system can be found in ADV990001. This list will be updated whenever a new servicing stack update is released. It is important to install the latest servicing stack update.
In addition to security changes for the vulnerabilities, updates include defense-in-depth updates to help improve security-related features.
Customers running Windows 7, Windows Server 2008 R2, or Windows Server 2008 need to purchase the Extended Security Update to continue receiving security updates. See 4522133 for more information.
FAQs, Mitigations, and Workarounds
The following CVEs have FAQs, Mitigations, or Workarounds. You can see these in more detail from the Vulnerabilities tab by selecting FAQs, Mitigations and Workarounds columns in the Edit Columns panel.

CVE-2020-24587
CVE-2021-1720
CVE-2021-26419
CVE-2021-28455
CVE-2021-28465
CVE-2021-28474
CVE-2021-28479
CVE-2021-31166
CVE-2021-31171
CVE-2021-31173
CVE-2021-31174
CVE-2021-31175
CVE-2021-31176
CVE-2021-31177
CVE-2021-31178
CVE-2021-31179
CVE-2021-31180
CVE-2021-31184
CVE-2021-31186
CVE-2021-31191
CVE-2021-31205
CVE-2021-31206
CVE-2021-31207
CVE-2021-31209
CVE-2021-31211
CVE-2021-31213
CVE-2021-31214
CVE-2021-31936
Known Issues
You can see these in more detail from the Deployments tab by selecting Known Issues column in the Edit Columns panel.

For more information about Windows Known Issues, please see Windows message center (links to currently-supported versions of Windows are in the left pane).

KB Article Applies To
5003169 Windows 10, Version 1909, Windows Server, Version 1909
5003171 Windows 10, Version 1809, Windows Server 2019
5003173 Windows 10, Version 2004, Windows Server, Version 2004, Windows 10, Version 20H2, Windows Server, Version 20H2
5003197 Windows 10, Version 1607, Windows Server 2016
5003203 Windows Server 2012 (Security-only update)
5003208 Windows Server 2012 (Monthly Rollup)
5003209 Windows 8.1, Windows Server 2012 R2 (Monthly Rollup)
5003210 Windows Server 2008 SP2 (Monthly Rollup)
5003220 Windows 8.1 Windows Server 2012 R2 (Security-only update)
5003225 Windows Server 2008 SP2 (Security-only update)
5003228 Windows 7 SP2, Windows Server 2008 R2 (Security-only update)
5003233 Windows 7 SP2, Windows Server 2008 R2 (Monthly Rollup)
5003435 Exchange Server 2019, 2016, and 2013

https://msrc.microsoft.com/update-guide/releaseNote/...