Describe CVE-2020-16891.
What is CVE-2020-16891?
<p>A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code.</p>
<p>An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.</p>
<p>The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.</p>
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