Cloudflare has successfully mitigated a massive distributed denial-of-service (DDoS) attack that peaked at a staggering 22.2 terabits per second (Tbps) and recorded an extraordinary 10.6 billion packets per second (Bpps). This event underscores the increasing scale and sophistication of cyberattacks targeting critical global infrastructure.
This attack comes shortly on the heels of Cloudflare’s previous announcement regarding an 11.5 Tbps attack, which had only recently held the record for the largest publicly disclosed attack. Earlier in the year, the company also reported a 7.3 Tbps incident. The rapid succession of these increasingly powerful attacks highlights a concerning trend in record-setting assault volumes occurring in quick intervals, prompting worries among enterprises and service providers about the resilience of internet infrastructure.
DDoS attacks function by overwhelming networks and systems with a flood of malicious traffic, exhausting bandwidth, processing power, or device memory. Though this particular attack lasted only 40 seconds, its traffic volume was equivalent to one million simultaneous 4K video streams. The packet rate of 10.6 Bpps suggested that if every person on Earth refreshed a webpage once per second, it would still be insufficient against the onslaught, straining load balancers, firewalls, and routers to their limits.
While Cloudflare did not provide specifics on the attack’s origin, security analysts have linked these major assaults to the AISURU botnet. This botnet purportedly consists of over 300,000 compromised devices worldwide—including IP cameras, DVRs, NVRs, and home routers. The botnet’s impact amplified following a cyber breach of Totolink’s router firmware update server in April 2025, exploiting vulnerabilities found in Realtek chipsets as well as devices from brands like Linksys, Zyxel, D-Link, and T-Mobile.
The growing prevalence of high-bandwidth and high-packet-rate DDoS campaigns poses a significant operational challenge for businesses and digital service providers. Although network backbone capabilities have scaled to meet increasing data demands, the intensity of packet saturation from these assaults can potentially overwhelm even the most advanced network defenses if not managed promptly. Cloudflare’s ability to divert this latest attack reinforces the critical need for hyperscale, cloud-native security solutions in response to an evolving threat landscape.
This record event further illustrates how attackers are increasingly utilizing more distributed and sophisticated botnets, transforming everyday connected devices into weapons against the very infrastructure that supports the digital economy. For organizations, these ongoing incidents serve as important reminders that resilience strategies must factor in not only data throughput but also the capacity for handling packet-processing, as adversaries continue to push the limits of both.
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