The record for DDoS attack power set in June 2025 has already been broken. Cloudflare announced that it recently blocked the largest DDoS attack on record, whose peak bandwidth reached 11.5 Tbps.
“Cloudflare’s protection systems operate without interruption. Over the past few weeks, we have blocked hundreds of hyper-volumetric DDoS attacks, the largest of which peaked at 5.1 billion packets per second and 11.5 Tbps,” Cloudflare said.
According to the company, the attack was a UDP flood originating from a number of cloud and IoT providers, one of which was Google Cloud. Cloudflare representatives have promised to publish a detailed report on this incident in the near future.
Judging by the image attached to the company’s announcement, the record-setting attack lasted only about 35 seconds.
Recall that the previous record was set in June of this year. At the time, Cloudflare reported that it had neutralized a DDoS attack targeting an unnamed hosting provider, with a peak bandwidth of 7.3 Tbps.
This attack exceeded the previous record by 12%, which was set in January 2025 at 5.6 Tbps.
At the time, specialists wrote that in just 45 seconds a massive volume of data — 37.4 TB — was transmitted. This is equivalent to roughly 7,500 hours of HD streaming or sending 12,500,000 JPEG images.
In its report for the first quarter of 2025, Cloudflare reported that last year it mitigated a total of 21.3 million DDoS attacks targeting its customers, as well as more than 6.6 million attacks against the company’s own infrastructure.