Hackers have attacked networks in a number of countries including data centers in Iran where they left the image of a U.S. flag on screens along with a warning: “Don’t mess with our elections”, the Iranian IT ministry said. The statement said the attack, which hit internet service providers and cut off web access for subscribers, was made possible by a vulnerability in routers from Cisco which had earlier issued a warning and provided a patch that some firms had failed to install over the Iranian new year holiday.
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