Microsoft has released an urgent update for Windows 10 and Windows Server 2019. If you use either of these operating systems, you should update your system today.
The vulnerabilities could allow a remote attacker to take control of an unpatched system. The issue related to how some image files are handled by the Windows codec library. An image file infected with malicious code could be used to take over an unprotected computer. So, go to Windows Update and install any available updates then go to the Windows Store and be sure any Windows app updates are installed.