These 'human machine interfaces' control systems like dams, water pumps and oil wells, and hackers could disrupt supply or production by exploiting these vulnerabilities, warns Censys CEO Brad Brooks.
There’s no evidence of widespread hijacking, but "hackers have manipulated them", Bloomberg reports.
The US Environmental Protection Agency has contacted operators of vulnerable water systems to improve cybersecurity practices after Censys identified around 18,000 exposed systems across the US.