Shumenov's effort outdid Michael Spinks, who held the previous mark by winning a championship in his 17th pro fight.
The scorecoards revealed a peculiar discrepancy. Judge Levi Martinez scored the fight strongly in favor of Campillo (117-111), while both other judges went for Shumenov: Jerry Roth had it 115-113 while Particia Morse Jarman scored the fight 117-111.
Shumenov started strongly, controlling the action in the early rounds before Campillo rallied in the middle rounds.
"I'm not surprised by the decision," Shumenov said. "I had the better trainer and he told me what to do to win."
"This win is for my friends and family back in Kazakhstan."
Friday's bout was a rematch of their title fight last August when Capillo won a contentious mixed decision, and this time around it was the Spaniard who was angered by the scoring.
"I got robbed," Campillo said. "I want an investigation of the judges."
Shumenov upped his record to 9-1 with six knockouts. Campillo, from Spain, fell to 19-3 with five KOs.
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