LONDON (AP) — Network technology company Cisco Systems said Wednesday that a half a million routers had been compromised in preparation for what could be a major cyberattack against Ukraine, raising the specter of large-scale disruption timed to the upcoming Champions League soccer final there. Ukraine's Cyberpolice said in a statement that it was possible the hackers planned to strike during "large-scale events," an apparent reference either to the match between Real Madrid and Liverpool in the capital, Kiev, on Saturday or to the country's upcoming Constitution Day celebrations. What precisely was in the works remains unclear —Cisco said it published its findings early — but researchers said that at least 500,000 devices had been hijacked by malicious software they dubbed VPNFilter. "The damage possible with that many infected machines is hard to precisely quantify," said Craig Williams, the director of outreach for Talos, Cisco's digital threat intelligence unit.Read more on NewsOK.com