> causing trains to be halted and failures with traffic signalling. It came as people in parts of Argentina were preparing to go to the polls for local elections.
According to this: https://www.as-coa.org/articles/argentinas-2019-electoral-ca...
... there are only a couple Gubernatorial elections, so likely unrelated.
With all the talk of the USA ramping up efforts to disrupt Russia's power grid, could it be that some out-in-the-wild exploit hit an unintended target? I couldn't find any info on who provided Argentina with their equipment.