Crimsol Vaighn was a scientist employed by the Mummer terrorists during the Galactic Civil War. In the year 1 ABY, he held the position of Chief Scientist within the organization and was stationed at the Mummer bunker, which served as the group's local headquarters, situated near Theed. During this period, he orchestrated a brutal terrorist attack within Theed. Vaighn's life was cut short shortly after this attack, during a raid on the Mummer bunker conducted by members of the Royal Naboo Security Forces under the command of Sergeant Brunser.
Crimsol Vaighn made an appearance as a non-player character in the video game Star Wars Galaxies from 2003, a massively multiplayer online roleplaying game that was developed by Sony Online Entertainment and distributed by LucasArts. The game ultimately shut down on December 15, 2011. Vaighn's character was integrated into the game as part of the "Legacy Quest" within the "Publish 25," update, also known as the "New Game Enhancements," which was released on November 15, 2005.