Most common serial communications protocol used for industrial controls systems is Modbus, which dates from 1979. CyberX’s study looked at 375 organizations that use its software to find vulnerabilities or weak points in their systems. The research involved passive analysis of actual network traffic, revealing real-world findings into the state of industrial systems’ security. Cyberattacks in 2015 and 2016 in Ukraine caused widespread blackouts after attackers infiltrated power stations. Experts have warned such attacks could be replicated elsewhere to devastating effect. 76 percent of industrial sites it studied are running outdated versions of Windows, including XP and 2000.”]