Win McNamee/Getty Images By David DiMolfetta | July 13, 2026 11:24 AM ET Suspicious activity on the Homeland Security Information Network, which is being used to support World Cup games around the U.S., was first detected around mid-to-late May. DHS Cyber Threats Data Breaches Department of Homeland Security personnel twice dismissed signs of cyber intruders inside the agency’s Homeland Security Information Network as harmless activity, allowing hackers to remain undetected inside for weeks and ...