The former WSOF strawweight champion, who lost to 115-pound contender Claudia Gadelha in her promotional debut last August, was slated to meet Juliana Lima at UFC 197, but was forced out of the contest due to a knee injury.
The promotion is currently looking for a new opponent for Lima (8-2), who defeated Nina Ansaroff and Ericka Almeida after losing to current champion Joanna Jedrzejczyk in her UFC debut on July 2014.
According to sources, Aguilar is scheduled to undergo knee surgery on Tuesday.
UFC 197 takes place at the MGM Grand Garden Arena in Las Vegas, and features two championship fights.