I hope you guys heard about the PrintNightmare vulnerability and millions of Windows systems are affected with this critical vulnerability. PrintNightmare exploit takes advantage of a security vulnerability found within the Windows Print Spooler service which gives a high privileged access to the attacker.
If anyone is interested to read the walkthrough, check this page. It is very easy to replicate. You just need to have a couple of machines and with the PoC, you can see how it is being done.