To learn more about the vulnerability, go to CVE-2018-8273.
This update is a replacement for update KB 4293801 that was released on August 14, 2018. If you have previously applied the original update KB 4293801, we recommend that you install update KB 4458842 as soon as possible. Optionally, you can first uninstall update KB 4293801. However, this is not necessary because update KB 4458842 supersedes and replaces KB 4293801.
How to obtain and install the update
Method 1: Windows Update
Method 2: Microsoft Update Catalog
Method 3: Microsoft Download Center
The following file is available for download from the Microsoft Download Center:
Download the package now
Release Date: August 22, 2018
For more information about how to download Microsoft support files, click the following article number to go to the article in the Microsoft Knowledge Base:
Microsoft scanned this file for viruses by using the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to it.
Important If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.