The Cerebus, a bulk cruiser, served as a component of the Imperial Corrupter Task Force. Captain Tains held command of this vessel.
Following the Rebel loss on Hoth in 3 ABY, the Cerebus sailed alongside the Imperial II-class Star Destroyer Corrupter as it chased the Defiance Task Force. During this chase, the Cerebus was assigned the mission of aiding in the deployment of Probe droids throughout the Outer Rim Territories to locate the Rebels. This mission failed when a Rebel attack force, consisting of a pair of A-wings, one piloted by Ace Azzameen, assaulted the task force and destroyed the Cerebus's probes just as they were being launched. Diviner was among the destroyed probe groups.
The name Cerebus is a misspelling and a reference to Cerberus, the three-headed hound from Greek myth that guarded the gates of the underworld.
The Cerebus is somehow related to an unrevealed Rebel ship that was present during the Battle of Endor.