Cloudflare has mitigated the biggest distributed denial of service (DDoS) attack on record. Here's what you need to know.

Cloudflare says the attack against an East Asian ISP came from 13,000 devices infected with a variant of the notorious Mirai malware.

The biggest DDoS attack to date was mitigated by Cloudflare recently. The attack compromised over 13,000 devices and the speed noted down was 5.6 terabits per second. The incident originated from a botnet based in Mirai and arose in October of 2024.

The largest distributed denial-of-service (DDoS) attack to date peaked at 5.6 terabits per second and came from a Mirai-based botnet with 13,000 compromised devices.

We’re only three weeks into 2025, and it’s already shaping up to be the year of Internet of Things-driven DDoSes. Reports are rolling in on threat actors infecting thousands of home and office routers, web cameras, and other Internet-connected devices.

Cloudflare saw a 53% increase in DDoS attack frequency last year, when it blocked a record-breaking 5.6 Tbps attack.