2025 Biannual DDoS Report
DDoS attacks are evolving. Are you ready?
Explore six months of real-world DDoS attack data from DigiCert's Security Operations Center to understand shifting tactics and emerging threats.
Inside the 2025 DDoS report, you’ll:
- Discover why DDoS attack volumes declined 84% while targeted disruptions remained a threat to business availability.
- Explore how attackers are shifting toward shorter, lower-bandwidth attacks and away from large-scale campaigns.
- See which industries and countries faced the most DDoS activity—and what the findings mean for network defense.
Fewer attacks. Persistent disruption risks.
DDoS attack volumes fell sharply in the first half of 2025, but the threat hasn't disappeared. Attackers are shifting tactics as law enforcement disrupts botnets and DDoS-for-hire services. Drawing on attacks detected and mitigated by DigiCert UltraDDoS Protect, this report examines the changing threat landscape and why organizations must remain prepared.
The DDoS threat is evolving
15,260
DDoS attacks detected and
mitigated in the first half of 2025
813.39 Gbps
Largest DDoS attack observed
during the reporting period
72.31%
Of observed attacks measured
0.5 Gbps or less
Source: DigiCert UltraDDoS Protect, Biannual Distributed Denial-of-Service Analysis, January–June 2025. Published August 2025.
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