An Examination of Foreign Adversary Threats to Subsea Cable Infrastructure

Committee on Homeland Security, Subcommittee on Transportation and Maritime Security and Subcommittee on Cybersecurity and Infrastructure Protection · November 21, 2025

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Chair opened the joint hearing to examine national security, economic, and resilience risks tied to subsea (submarine) telecommunications cables and to evaluate how foreign actors — particularly China and Russia — might exploit that infrastructure for espionage, coercion, or sabotage.

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A joint House Homeland Security hearing examined risks to subsea telecommunications cables, with witnesses urging a coordinated federal lead, faster permitting, more repair ships, and stronger penalties to deter state and nonstate threats. Lawmakers across the aisle pressed industry and DHS on resilience, attribution, and international cooperation.

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