According to the security document released by Britain Ministry, sophisticated hackers now has the capability of breaking into a plane's sophisticated on-board computer systems and forcing it to crash.
They could also target critical infrastructure such as nuclear power stations and electricity supplies, reports the Daily Mail.
These hackers can be engaged by terror cells and foreign states to cause maximum damage, British Prime Minister David Cameron's long-awaited National Security Strategy report said.
This cyber threat makes it possible for a potential hijacker to carry out his attack without boarding the plane.
Officials confirmed that these computer-generated assaults, which involve individuals creating software viruses or rogue computer programs and emails, could bring down passenger planes.