Charcot–Marie–Tooth disease
Mustafaiev was born in Chinaz, Tashkent Region, Uzbek SSR, Soviet Union. He is from Aqyar/Sevastopil, Ukraine. When he was five years old, he was diagnosed with Charcot–Marie–Tooth disease. He is married and has a daughter with his wife Yulia. He was previously married to Ukrainian Paralympic shooter Olga Mustafaieva. He speaks Russian, and does not speak Ukrainian.