September 10, 2019-KB4514359 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 version 1903 and Windows 10 version 1909

Summary

An elevation of privilege vulnerability exists when the .NET Framework common language runtime (CLR) allows file creation in arbitrary locations. An attacker who successfully exploited this vulnerability could write files to folders that require higher privileges than what the attacker already has.

To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE).

• CVE-2019-1142

Known issues in this update

Microsoft is not currently aware of any issues in this update.

How to get this update

Install this update

To download and install this update, go to Settings, Update & Security, Windows Update, and then select Check for updates.

This update will be downloaded and installed automatically from Windows Update.
To get the standalone package for this update, go to the Microsoft Update Catalog website.

File information

For a list of the files that are provided in this update, download the file information for cumulative update 4514359.

Information about protection and security

• Protect yourself online: Windows Security support

• Learn how we guard against cyber threats: Microsoft Security