Cloudflare's Quarterly DDoS Threat Report for Q4 2025 highlights a significant escalation in Distributed Denial of Service (DDoS) attacks, with a staggering 121% increase in incidents throughout the year. The total number of attacks surpassed 47 million, averaging over 5,300 mitigations every hour. Network-layer DDoS attacks were particularly alarming, tripling from the previous year and accounting for 78% of all attacks in the final quarter. Notably, the Aisuru-Kimwolf botnet orchestrated an unprecedented campaign, launching attacks that exceeded 200 million requests per second, severely impacting Cloudflare's infrastructure and customers. Geographically, Hong Kong and the United Kingdom saw dramatic surges in attack frequency, with the UK jumping 36 spots to become the sixth most targeted location. The Telecommunications industry emerged as the prime target for attackers, while the Gaming and Generative AI sectors were also heavily affected. Bangladesh became the largest source of DDoS attacks, overtaking Indonesia, which dropped to third place. Argentina experienced a notable rise, becoming the fourth-largest source. The report emphasizes the evolution of DDoS tactics, particularly through hyper-volumetric attacks, which increased in size by over 700% compared to the previous year. One attack reached an astonishing 31.4 Tbps, lasting just 35 seconds. These attacks not only challenge existing DDoS mitigation strategies but also illustrate the growing sophistication and scale of threats facing critical infrastructure worldwide.