2025 Q4 DDoS threat report: A record-setting 31.4 Tbps attack caps a year of massive DDoS assaults
The number of DDoS attacks more than doubled in 2025. The network layer is under particular threat as hyper-volumetric attacks grew 700%.
Cloudflare's 2025 Q3 DDoS threat report -- including Aisuru, the apex of botnets
Welcome to the 23rd edition of Cloudflare’s Quarterly DDoS Threat Report. This report offers a comprehensive analysis of the evolving threat landscape of Distributed Denial of Service (DDoS) attacks based on data from the Cloudflare network. In this edition, we focus on the third quarter of 2025.
Hyper-volumetric DDoS attacks skyrocket: Cloudflare’s 2025 Q2 DDoS threat report
June was the busiest month for DDoS attacks in 2025 Q2, accounting for nearly 38% of all observed activity.
Defending the Internet: how Cloudflare blocked a monumental 7.3 Tbps DDoS attack
In mid-May 2025, Cloudflare blocked the largest DDoS attack ever recorded: a staggering 7.3 terabits per second (Tbps).
Targeted by 20.5 million DDoS attacks, up 358% year-over-year: Cloudflare’s 2025 Q1 DDoS Threat Report
DDoS attacks are surging. In 2025 Q1, Cloudflare blocked +20M attacks (a 358% YoY spike) along with 5.6 Tbps and 4.8 Bpps record-breaking attacks.
Cloudflare thwarts over 47 million cyberthreats against Jewish and Holocaust educational websites
January 27 marks the International Holocaust Remembrance Day — a solemn occasion to honor the memory of the six million Jews who perished in the Holocaust, along with countless others who fell victim
Record-breaking 5.6 Tbps DDoS attack and global DDoS trends for 2024 Q4
2024 ended with a bang. Cloudflare mitigated another record-breaking DDoS attack peaking at 5.6 Tbps.
4.2 Tbps of bad packets and a whole lot more: Cloudflare's Q3 DDoS report
The number of DDoS attacks spiked in the third quarter of 2024. Cloudflare mitigated nearly 6 million DDoS attacks, representing a 49% increase QoQ and 55% increase YoY.
How Cloudflare auto-mitigated world record 3.8 Tbps DDoS attack
Over the past couple of weeks, Cloudflare's DDoS protection systems have automatically and successfully mitigated multiple hyper-volumetric L3/4 DDoS attacks exceeding 3 billion packets per second (Bpps). Our systems also automatically mitigated multiple attacks exceeding 3 terabits per second (Tbps), with the largest ones exceeding 3.65 Tbps. The scale of these attacks is unprecedented.
DDoS threat report for 2024 Q2
Welcome to the 18th edition of the Cloudflare DDoS Threat Report. Released quarterly, these reports provide an in-depth analysis of the DDoS threat landscape as observed across the Cloudflare network. This edition focuses on the second quarter of 2024
DDoS threat report for 2024 Q1
2024 started with a bang. Cloudflare’s autonomous systems mitigated over 4.5 million DDoS attacks in the first quarter of the year — a 50% increase compared to the previous year. Read the full coverage
Advanced DNS Protection: mitigating sophisticated DNS DDoS attacks
We're proud to introduce the Advanced DNS Protection system, a robust defense mechanism designed to protect against the most sophisticated DNS-based DDoS attacks
Cyber attacks targeting Jewish and Holocaust educational websites surge by 872% in 2023
In 2023, Cloudflare mitigated 35.7 million malicious requests that targeted Jewish and Holocaust educational websites.
DDoS threat report for 2023 Q4
Welcome to the sixteenth edition of Cloudflare’s DDoS Threat Report. This edition covers DDoS trends and key findings for the fourth and final quarter of the year 2023, complete with a review of major trends throughout the year
DDoS threat report for 2023 Q3
In the past quarter, DDoS attacks surged by 65%. Gaming and Gambling companies were the most attacked and Cloudflare mitigated thousands of hyper-volumetric DDoS attacks. The largest attacks we saw peaked at 201 million rps and 2.6 Tbps.
Cyber attacks in the Israel-Hamas war
Since the October 7 Hamas attack, DDoS attackers have been targeting Israeli newspaper and media websites as well as software companies and financial institutions.
DDoS threat report for 2023 Q2
Q2 2023 saw an unprecedented escalation in DDoS attack sophistication. Pro-Russian hacktivists REvil, Killnet and Anonymous Sudan joined forces to attack Western sites. Mitel vulnerability exploits surged by a whopping 532%, and attacks on crypto rocketed up by 600%.
SLP: a new DDoS amplification vector in the wild
Researchers have recently published the discovery of a new DDoS reflection/amplification attack vector leveraging the SLP protocol. Cloudflare expects the prevalence of SLP-based DDoS attacks to rise in the coming weeks
