Microsoft Patch Tuesday – May 2021

Microsoft released its Patch Tuesday, May 2021 with updates and security patches to fix 55 security flaws within Windows and other products. From these flaws, 4 are rated as critical and 3 are zero-day vulnerabilities.

⚡ TL;DR | Go Straight to the May 2021 Patch Tuesday Audit Report.

3 Zero-Day Vulnerabilities Fixed

In their Patch Tuesday of May 2021, three publicly-disclosed zero-day vulnerabilities were patched:

• CVE-2021-31204 – .NET and Visual Studio Elevation of Privilege vulnerability
• CVE-2021-31207 – Exchange Server Security Bypass Feature Vulnerability
• CVE-2021-31200 – Common Utilities Remote Code Execution vulnerability.

Windows 10 End of Service

Windows 10 Version 1803 & Version 1809

Microsoft just released the last update for version 1803 of Windows 10 named KB5003174. This contains the new Microsoft Edge, updates to improve Windows OLE security, and updates for Bluetooth drivers. Version 1809 received the update KB5003171 which improves security when Windows performs basic operations, updates to improve the Windows OLE security, and updates for the Bluetooth drivers.

These updates remove the Edge Legacy desktop application (which is out of support) and install the new Edge. There are also security updates for Windows App Platform and Framework, Microsoft Scripting Engine, Windows Silicon Platform, and Windows Cryptography.

Remember that this is the latest security update for this version, start updating all your Windows 10 installations.

Windows 10 Version 1909

Version 1909 of Windows also received the last update (KB5003169) for the Home and Pro editions which updates an issue that might cause scroll bar controls to appear blank and not function. This issue affects 32-bit applications running on 64-bit Windows 10.

Run the Patch Tuesday (May 2021) Audit Report

Our experts created a Patch Tuesday Audit Report that checks if the assets in your network are on the latest patch updates. It’s color-coded to give you an easy and quick overview of which assets are already on the latest Windows update, and which ones still need to be patched. As always, all admins are advised to install these security updates as soon as possible to protect Windows from security risks.

Other Vulnerability CVE Codes & Description

If you haven’t already, start your free trial of Lansweeper to run the Microsoft Patch Tuesday Report. Make sure to subscribe via the form below if you want to receive the latest Microsoft Patch reports and bonus network reports.

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