Any public facing USB port should be considered an attack vector. In data security, these ports are often locked down to prevent exfiltration of data, or infiltration of malware, but are very often unprotected against electrical attack!
USB kill 2.0 is the only tool available in the market to test the effects of USB power surge attacks, The USB Kill 2.0 is a quality high-voltage device built to allow for people to test safely.