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Cloudflare Thwarts Record 11.5 Tbps DDoS Attack

9/4/2025

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Summary

Story summary

Cloudflare blocked a record DDoS attack peaking at 11.5 Tbps, lasting 35 seconds and involving a UDP flood.
In 2025, Cloudflare mitigated 27.8 million DDoS attempts, exceeding the total for 2024.
Google clarified that initial reports attributing most attack traffic to its cloud services were inaccurate, indicating a multi-source origin.

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Story summary

Cloudflare blocked a record DDoS attack peaking at 11.5 Tbps, lasting 35 seconds and involving a UDP flood.
In 2025, Cloudflare mitigated 27.8 million DDoS attempts, exceeding the total for 2024.
Google clarified that initial reports attributing most attack traffic to its cloud services were inaccurate, indicating a multi-source origin.