Homeland Security Network Breach Exposes Sensitive Government Data

The Department of Homeland Security confirms a significant cyber breach of its Homeland Security Information Network, or HSIN. The platform is a critical tool used by federal, state, and local agencies to coordinate emergency responses and share intelligence.

Officials state the incident exposed sensitive, but unclassified, planning details for major events. The DHS has isolated the affected systems and launched a forensic investigation. There is no indication that classified networks were impacted.

The breach has drawn sharp criticism from senior lawmakers. Senator Mark Warner, Vice Chair of the Senate Intelligence Committee, called the incident a serious risk to national security. He demanded a full accounting from the DHS and the Department of Justice on the attackers' access and methods.

The investigation is ongoing. The system remains operational for partners.