The fight, which was originally set to take place in December, had been pushed back due to a Vegh injury.
The bout, which was confirmed by the promotion in a press release, will take place at New Mexico's Santa Ana Star Center. In releasing the news, no other fights were announced for the date.
M'Pumbu (18-4-1) originally captured the belt in May 2011 with a TKO over Rich Hale, but in October of that year, he lost a non-title match to Travis Wiuff. He didn't fight during all of 2012.
Vegh comes in riding the momentum of an eight-fight win streak. He stormed through the most recent 205-pound tournament with wins over Zelg Galesic, Emanuel Newton and Travis Wiuff. He boats a 28-4 record.