In mid-May 2025, Cloudflare autonomously blocked a record-breaking Distributed Denial of Service (DDoS) attack that peaked at 7.3 terabits per second (Tbps), surpassing previous records by 12%. This attack targeted a hosting provider customer using Cloudflare's Magic Transit to protect their IP network. The massive attack, delivering 37.4 terabytes in just 45 seconds, utilized a multivector approach primarily consisting of UDP floods, with minor contributions from other reflection and amplification attack types. Originating from over 122,145 source IP addresses across 161 countries, the attack predominantly came from Brazil and Vietnam. Cloudflare's global network, leveraging its autonomous detection and mitigation systems, managed to block the attack across 477 data centers worldwide without human intervention. The company's advanced techniques, such as real-time fingerprinting and the distribution of threat intelligence, underscore its commitment to improving Internet security and offering free unmetered DDoS protection.