Windows 10 KB5004237 & KB5004245 Aggregate Updates Released

As part of the July 2021 Patch Tuesday, Microsoft has posted new KB5004237 and KB5004245 aggregate updates for current versions of Windows. Today’s aggregate updates consist up of security fixes for PCs with May 2021 Update, October 2020 Update, and May 2020 Update.

This month’s KB5004237 and KB5004245 cumulative updates are part of the essential Patch Tuesday updates containing various bug fixes and performance improvements. Also included the security updates for 117 vulnerabilities in the OS, browser, core elements, and other basic functionality.

Below is the full list of today’s cumulative updates:

Windows users should install these updates as soon as possible as they include fixes for nine zero-day vulnerabilities, with four currently exploited by the threat actor. As with every Windows Update, you can launch Settings, then tap on Windows Update, and then select ‘Check for Updates to install the updates.


How Builds 19043.1110, 19042.110, and 19041.1110 are advanced?

After installing the KB5004237 update, Windows 10 2004 will be updated to build 19041.1110, Windows 10 20H2 will be updated to build 19042.110, and Windows 10 21H1 will be built 19043.1110.

What are the Bugs Fixes in KB5004327?

· Address a concern that might print to some printers difficult. This issue affects different brands and models, but primarily receipts or label printers that connect using a USB port.

· Addresses a remote code execution exploit in the Windows Print Spooler services, called “PrintNightmare”, as documented in CVE-2021-34527. After installing this and later Windows updates, users who are not administrators can only install signed print drivers to a print server. By default, administrators can install signed and unsigned printer drivers to a print server. The installed root certifies in the computer’s Trusted Root Certification Authorities trusts signed drivers, Microsoft advises that you urgently install this update on all supported Windows clients that server operating system, initiating with the device that currently hosts the print server role. You also have the option to set up.

The RestrictDriverInstallationToAdministrators registry settings to avoid non-administrators from installing signed printer drivers on a print server. 

  • Addresses a concern that might make printing to certain printers crucial. This concern affects numerous brands and models, but recently receipts or label printers that connect using a USB port.
  • Adds new Encryption Standard (AES) encryption protections for CVE-2021-33757. 
  • Addresses a vulnerability in which Primary Refresh Token is not strongly encrypted. The issue might permit the tokens to restate until the token terminates or is renewed. 
  • Security updates to Windows Apps, Windows Management, Windows Fundamentals, Windows Authentication, Windows User Account Control (UAC), Operating System Security, Windows Virtualization, Windows Linux, the Windows Kernel, the Microsoft Scripting Engine, the Windows HTML Platforms, the Windows MSHTML Platform, and Windows Graphics.
  • Update a concern in a small subset of the user that has lower than expected functionality in games after installing KB5000842 or later.
  • Updates an issue in a small subset of users that have lower than expected performance in games after installing KB5000842 or later.  
  • Updates an issue that causes the Japanese Input Method Editor (IME) to suddenly stop working while you are typing. 
  • Updates an issue in which signing in using a PIN fails. The error message is “Something happened and your PIN isn’t available. Click to set up your PIN again.”
  • Updates an issue that, in certain cases, takes you out of the exclusive virtual reality (VR) app and back to Windows Mixed Reality Home when you press the Windows button on the controller.
  • Updates an issue that causes blurry text on the news and interests button on the Windows taskbar for some screen resolutions.
  • Updates an issue with Search box graphics on the Windows taskbar that occurs if you right-click the taskbar and turn off News and interests. This graphics issue is especially visible when using dark mode.
  • Updates an issue that might prevent you from using your fingerprint to sign in after startup or waking up your device from sleep.
  • Updates an issue that might cause a high-pitched noise or squeak in certain apps when you play 5.1 Dolby Digital audio using certain audio devices and Windows settings.

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