The Malsuum system existed in the Inner Rim section of the galaxy, and it was a star system. The planet Malsuum was part of this system.
The 2015 update to The Essential Atlas Online Companion featured a system referred to as "Malsum." Jason Fry, who co-authored The Essential Atlas, clarified afterward that the system's name was misspelled and should have been Malsuum, matching the spelling in the comic Darth Vader and the Cry of Shadows.