KB4592449 has become readily available for both Windows 10 1909 & 1903 versions. Here are the links to download KB4592449 offline installer from Microsoft.

As always, Microsoft released a slew of new cumulative updates as part of the patch Tuesday. KB4592449 update for v1909 and v1903 users and KB4592438 for v20H2 and v2004 users. Unlike the prior cumulative updates, the KB4592449 update is pretty small but contains important security fixes for various parts of Windows 10. Mainly, the KB4592449 has security fixes for that File Explorer, Edge legacy browser, Office products, Windows virtualization, Windows Fundamentals, etc.

As being a security update, it doesn't contain every other improvements or fixes. As such, the KB4592449 update shouldn't cause any big issues for any vast majority of users. So, it is better to install the update as soon as possible to prevent any security issues and vulnerabilities.

To set up the update directly from the Settings app, open it up, go to the "Update & Security → Windows Update" and then click the "Check for updates" button. Alternatively, you are able to let Windows install the update while using automatic updates feature. Otherwise, download the KB4592449 offline installer using the links provided below.

Download KB4592449 offline installer

To create things easier for you, I discovered the direct download links for KB4592449 for both Windows 10 32-bit and 64-bit systems. Depending on the body type, download the update while using below links and install it like any other Windows software. After installing, restart the system and you are good to go.

If you want KB4592449 download links for Windows Server, ARM64 based systems, or some other version then go to the Microsoft update catalog web site to find the appropriate links. All you need to do is click the Download button next to the appropriate version.

KB4592449 changelog

Security updates to Microsoft Edge Legacy, the Microsoft Graphics Component, Windows Media, Windows Fundamentals, and Windows Virtualization.

That's it.