Windows Server 2012 R2 privilege escalation involves an attacker increasing their access rights from a standard or limited user to administrator or SYSTEM level by exploiting software vulnerabilities, weak configurations, or excessive permissions. Typical causes include unpatched operating system flaws, misconfigured services and scheduled tasks, insecure file or registry permissions,... https://bdwebit.com/blog/windows-server-2012-r2-privilege-escalation/