"The Department of Homeland Security plans to issue a security alert Tuesday for small planes, warning that modern flight systems are vulnerable to hacking if someone manages to gain physical access to the aircraft.
An alert from the DHS critical infrastructure computer emergency response team recommends that plane owners ensure they restrict unauthorized physical access to their aircraft until the industry develops safeguards to address the issue, which was discovered by a Boston-based cybersecurity company and reported to the federal government."
usnews.com/news/business/articles/2019-07-30/apnewsbreak-us-issues-hacking-alert-for-small-planes