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Taiwan High-Speed Rail Emergency Braking Hack: How a Student Stopped the Trains and Exposed a Major Security Gap

Securityaffairs.Co •Pierluigi Paganini • May 6, 2026

Taiwan high‑speed rail was disrupted after a 23‑year‑old student spoofed signals and triggered an emergency alarm, stopping four trains for nearly an hour. Taiwan high‑speed rail system, one of the most important pieces of national infrastructure, was thrown into chaos during the Qingming Festival holiday when several trains suddenly came to an unexpected halt. Experts […]

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Taiwan Student Disrupts High-Speed Rail with Radio Hack A 23-year-old university student in Taiwan, surnamed Lin, was arrested for halting four high-speed trains for 48 minutes on April 5, 2026. He used software-defined radio (SDR) equipment to transmit a false General Alarm signal, triggering emergency braking procedures on the Taiwan High-Speed Rail (THSR) network. The attack exploited a vulnerability in the TETRA communication system, which had not updated its parameters in 19 years, allowing Lin to bypass multiple security layers. Police discovered that Lin had decoded TETRA parameters and cloned signals using equipment purchased online. An accomplice provided critical parameters for the attack. Lin faces potential imprisonment of up to 10 years under Taiwan's Criminal Law and is currently out on NT$100,000 ($3,280) bail. The incident has raised concerns about the safety and security of critical infrastructure in Taiwan. 10 sources 67

Taiwan High-Speed Rail Emergency Braking Hack: How a Student Stopped the Trains and Exposed a Major Security Gap

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