KB4592438 update for Windows 10 20H2 and 2004 releases

The last update of 2020 is now available for Windows 10 with security fixes, and here's all you need to know.

Windows 10 KB4592438
Windows 10 KB4592438

As part of the last Patch Tuesday of the year, Microsoft is now rolling update KB4592438 for devices running version 20H2 and 2004 of Windows 10. This is a small update meant to address a couple of problems with the most recent versions of the operating system.

The update KB4592438 bumps the version number to builds 19041.685 and 19042.685 for the May 2020 Update and October 2020 Update respectively, and according to the company fixes a security vulnerability with permissions and brings some security patches for various system components.

In addition, Microsoft is also making available the same fixes for older versions, including for version 1909, 1903, 1809, 1803, 1703, 1607, and 1507. 

Windows 10 December 2020 update 

Microsoft has announced the KB4592438 update in the Windows support site. If you are already running the Windows 10 October 2020 Update or May 2020 Update, you will fix this problems:

  • Fixes a security vulnerability by preventing applications that run as a SYSTEM account from printing to “FILE:” ports. To address this issue in the future, make sure your applications or services run as a specific user or service account.
  • Security updates to Microsoft Edge Legacy, the Microsoft Graphics Component, Windows Media, Windows Fundamentals, and Windows Virtualization.

You can download the updates to install them manually for version 20H2 or 2004 from the Microsoft Update Catalog website. The update is also available for devices in the Beta and Release preview channels of the Windows Insider Program.

Windows 10 version 1909 and 1903 are getting the same fixes, but the update is described as KB4592449, and the operating system gets bump to build 18362.1256 and 18363.1256, respectively. 

In the case of version 1809, the update is available as KB4592440, and increases the build number to 17763.1637.

Finally, Windows 10 version 1803, 1703, 1607, and 1507 are receiving the same fixes, but as update KB4592446, KB4592473, KB4593226, and KB4592464, respectively, which addresses an extra issue that prevents the PDF24 app, version 9.1.1, from opening .txt files as well. These updates also increase the build number to 17134.1902, 15063.2584, 14393.4104, and 10240.18782.

Download December 2020 update for Windows 10

These updates are available immediately, they’ll download and install automatically, but you can always force the update from Settings Update & Security > Windows Update and clicking the Check for updates button. You can find more details about the most recent updates in the Windows 10 update history tracker guide.

About the author

Mauro Huculak is a Windows How-To Expert who started Pureinfotech in 2010 as an independent online publication. He has also been a Windows Central contributor for nearly a decade. Mauro has over 14 years of experience writing comprehensive guides and creating professional videos about Windows and software, including Android and Linux. Before becoming a technology writer, he was an IT administrator for seven years. In total, Mauro has over 20 years of combined experience in technology. Throughout his career, he achieved different professional certifications from Microsoft (MSCA), Cisco (CCNP), VMware (VCP), and CompTIA (A+ and Network+), and he has been recognized as a Microsoft MVP for many years. You can follow him on X (Twitter), YouTube, LinkedIn and About.me. Email him at [email protected].