(Bloomberg) — Vulnerabilities in a popular GPS tracker made in China and used around the world could allow hackers to disrupt vehicles, cut off their fuel and surveil drivers’ movements, according to new research. Several “severe” flaws in the Micodus MV720 tracker affect customers, private companies and government agencies, creating a “high risk” of personal injury, vehicle disablement and supply-chain disruption, according to Boston-based BitSight Technologies. Researchers believe 1.5 million Micodus devices are in use in more than 160 countries. The US Department of Homeland Security issued several warnings Tuesday about the flaws. Micodus didn’t immediately respond to emails and…