Microsoft has released December 2021 security updates for Windows 10/8/7, Windows Server 2022/2019/2016/2012/2008, and Office 2016/2013.
These updates include 35 security fixes. Users should update as soon as possible to avoid potential exploitation.
System administrators should update servers as soon as possible to avoid potential exploitation.
How to update Windows
December 2021 Security Updates (Release Notes)