Patrick Kiley, a senior security consultant at Rapid7 conducted an investigation into the security of avionics systems inside small airplanes. The results are disconcerting it is quite easy to hack a small plane. Kiley was able to able to send forged messages to the control systems of the aircraft and perform malicious activities. The impact of such an attack could be dire, but it requires physical access to the avionics system, which is highly regulated and controlled in the aviation sector, Kiley noted.”]
Source: https://securityaffairs.co/wordpress/89175/breaking-news/hack-avionics-systems.html