Without a mechanism to restrict access based on user’s need to know, a user may unknowingly be granted access to cardholder data. Access control systems automate the process of restricting access and assigning privileges.
Restricting privileged access with an access control system reduces the opportunity for errors in the assignment of permissions to individuals, applications, and systems.
A default setting of “deny all” ensures no one is granted access unless a rule is established specifically granting such access.
It is important to check the default configuration of access control systems because some are set by default to “allow all,” thereby permitting access unless/until a rule is written to specifically deny it.