Ford has suggested owners of vehicles equipped with its SYNC 3 infotainment system disable the Wi-Fi lest someone nearby exploits a buffer-overflow vulnerability and hijacks the equipment. According to [PDF] Texas Instruments, maker of the vulnerable Wi-Fi chipset in Ford vehicles, the flaw merits a 9.6 on the 10-point CVSS severity scale at the worst, and an 8.8 at minimum.
Source: The Register