The amount of electronic systems in cars is constantly increasing due to market demands. With the increasing complexity of new electronic driver assistance and infotainment systems, cars are not only becoming more comfortable and safer, but also more threatened by cyberattacks. The connected car and its components need to be secure throughout its entire lifecycle. To cope with this challenge, it is essential to continuously find out if, where, and how the car is vulnerable, what damage is associated with the threat, and how the impact of the threat will be managed. Otherwise, there are serious risks in the form of financial losses, legal consequences or loss of reputation. For this reason, the cybersecurity regulation ISO 21434 was implemented. It aims to establish a “cybersecurity by design” framework for the entire lifecycle of road vehicles.