According to Radio-Canada, the International Civil Aviation Organization (ICAO), which is part of the United Nations (UN), experienced the the “most serious cyberattack in its history” in November of 2016, but then kept quiet about it for months. As a result of the severely flawed way in which the ICAO

New reporting has revealed that DHS cyber experts conducting a full security assessment of the 757 aviation platform were successful in compromising the aircraft in less that two days. The experts warned that it is “a matter of time before a cybersecurity breach on an airline occurs.” Source: DHS experts