Modern vehicles are equipped with numerous Electronic Control Units (ECUs), each featuring intricate functionalities and being tightly interconnected via internal networks. Among these, the Controller Area Network (CAN) is the most common. Past research has revealed the CAN network to be vulnerable to a multitude of cybersecurity attacks, enabling an attacker to take control of safety-critical ECUs such as the ones managing the engine, steering, or brakes. Securing ECUs connected via the CAN network against cyber threats is of paramount importance since an infected ECU could be used to propagate the attack to the other units on the network. Fuzz testing is a widely adopted, automated software testing technique that helps identify vulnerabilities and defects in programs.