An in-band remote access controller access system includes a remote access controller. A Basic Input/Output System (BIOS) that is coupled to the remote access controller and includes a BIOS storage that stores a configuration table including a plurality of function definitions that are configured to provide for the management of an in-band communication session with the remote access controller. A secure storage system includes boot security information that is configured to provide for the performance of a managed boot of the BIOS. A processing system provides, to the remote access controller using at least one of the plurality of function definitions, application security information provided by an application requesting access to the remote access controller. The remote access controller authenticates the application security information using the boot security information and, in response, establishes a communication session with the application.