This update is required to install updates that are only SHA-2 signed. For more information on SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS. The Extended Security Updates (ESU) Licensing Preparation Package (KB4538483) released February 11, 2020.

The tool removes malicious software from an already-infected computer. Antivirus products block malicious software from running on a computer. It is significantly more desirable to block malicious software from running on a computer than to remove it after infection.

Summary. A remote code execution vulnerability exists in .NET Framework when the software fails to check the source markup of XML file input. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the process responsible for deserialization of the XML content.

An information disclosure vulnerability exists when the .NET Framework improperly handles objects in memory. An attacker who successfully exploited the vulnerability could disclose contents of an affected system's memory.

How to obtain and install the update. Before installing this update. Prerequisite: To apply this update, you must have .NET Framework 2.0, 3.0 installed. You must install the updates listed below and restart your device before installing the latest Rollup.

The security update addresses the vulnerability by correcting how .NET Framework processes input. For more information go to: https://go.microsoft.com/fwlink/?linkid=2138023. To learn more about the vulnerabilities, go to the following Common Vulnerabilities and Exposures (CVE). CVE-2020-1046.

How to obtain and install the update. Before installing this update. Prerequisite: You must install the updates listed below and restart your device before installing the latest Rollup.

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track. Run the System File Checker tool (SFC.exe)

Security Improvements. This security update addresses a vulnerability where restricted mode is triggered for the parsing of XPS files, preventing gadget chains which could allow remote code execution on an affected system. For more information please see CVE-2022-41089. Quality and Reliability Improvements.

Ultimate. Summary. An elevation of privilege vulnerability exists in .NET Framework which could allow an attacker to elevate their privilege level. To exploit the vulnerability, an attacker would first have to access the local machine, and then run a malicious program.