Exploitation allows an attacker to gain sensitive information from the toothbrush. No authentication is required to reach the affected application. The attacker only needs to be able to monitor the wireless transmission.
Your toothbrush can reveal sensitive information about you, it can be hacked and zero encryption is involved in the process. It’s fun times for hackers to try to hack anything with wireless access nowadays.
It’s a bit more concerning when most of the pacemakers on the market can be accessed with the passcode from the instruction manual. Ransomware is fun with toothbrush data but scary if the hacker can make your heart stop.