Russian hackers penetrated U.S. electricity grid through a utility in Vermont

While the Russians did not actively use the code to disrupt operations
of the utility, according to officials who spoke on condition of
anonymity in order to discuss a security matter, the penetration of the
nation’s electrical grid is significant because it represents a
potentially serious vulnerability. Government and utility industry
officials regularly monitor the nation’s electrical grid because it is
highly computerized and any disruptions can have disastrous implications
for the function of medical and emergency services.

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