The ability to hack into vehicles would facilitate “nearly undetectable assassinations”, as Wikileaks put it, re-igniting debate about the fate of Michael Hastings who died in a single vehicle car crash in which he sped up and drove into a tree.
Limited Hangout possibilities
The Vault 7 documents appear to be genuine. However, the possibility that they contain deliberately tainted information and were deliberately routed to Wikileaks cannot be ruled out. That routers have had a feature called "universal plug and play" turned on - which allows the firmware to be updated remotely - are vulnerable, is well known. These devices were released 15 years ago.
The time frame in: "As of October 2014 the CIA was also looking at infecting the vehicle control systems used by modern cars and trucks" is also potentially misleading because car computers have been "hack-able" since at least the mid-1990's. Since its inception the proprietary engine management and other control software installed by vendors has been progressively enabled to 'take-over' practically all modern automobile controls including acceleration, braking and steering.
The speculative wordings 'what "could" be done', '"would permit"...' may also instill feelings of excitement, fear, powerlessness and helplessness in people who are not aware of the technical details, which fits in the bigger picture of a strategy of tension.