An attacker can gain access to the network using a non-admin user account, and the next step would be to gain administrative privilege. There are two types of Privilege Escalation: Horizontal Privilege Escalation occurs when a malicious user attempts to access resources and functions that belong to peer users, who have similar access permissions. Vertical Privilege Escalation occurs when a malicious user attempts to access resources and functions that belong to a user with higher privileges, such as application or site administrators.
Privilege Escalation
Escalation of Privileges: