Hyper-volumetric DDoS attacks skyrocket: Cloudflare’s 2025 Q2 DDoS threat report
2025-07-15
June was the busiest month for DDoS attacks in 2025 Q2, accounting for nearly 38% of all observed activity....
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Defending the Internet: how Cloudflare blocked a monumental 7.3 Tbps DDoS attack
2025-06-19
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
2025-04-27
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....
Extending Cloudflare Radar’s security insights with new DDoS, leaked credentials, and bots datasets
2025-03-18
For Security Week 2025, we are adding several new DDoS-focused graphs, new insights into leaked credential trends, and a new Bots page to Cloudflare Radar. ...
QUIC action: patching a broadcast address amplification vulnerability
2025-02-10
Cloudflare was recently contacted by researchers who discovered a broadcast amplification vulnerability through their QUIC Internet measurement research. We've implemented a mitigation....
MORE POSTS
January 27, 2025 10:07 PM
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...
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January 21, 2025 2:00 PM
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....
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December 23, 2024 2:00 PM
Global elections in 2024: Internet traffic and cyber threat trends
In 2024, as elections took place across over 60 countries, the Internet became both a battleground for cyberattacks and a vital platform for democratic engagement....
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December 03, 2024 8:43 PM
From deals to DDoS: exploring Cyber Week 2024 Internet trends
How significant are Cyber Week shopping days on the Internet? Is it a global phenomenon? Does E-commerce interest peak on Black Friday or Cyber Monday, and are attacks increasing during this time? ...
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November 20, 2024 10:00 PM
Bigger and badder: how DDoS attack sizes have evolved over the last decade
If we plot the metrics associated with large DDoS attacks observed in the last 10 years, does it show a straight, steady increase in an exponential curve that keeps becoming steeper, or is it closer to a linear growth? Our analysis found the growth is not linear but rather is exp...
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November 06, 2024 8:00 AM
Exploring Internet traffic shifts and cyber attacks during the 2024 US election
Election Day 2024 in the US saw a surge in cyber activity. Cloudflare blocked several DDoS attacks on political and election sites, ensuring no impact. In this post, we analyze these attacks, as well Internet traffic increases across the US and other key trends....
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October 23, 2024 1:05 PM
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....
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October 23, 2024 1:00 PM
Training a million models per day to save customers of all sizes from DDoS attacks
In this post we will describe how we use anomaly detection to watch for novel DDoS attacks. We’ll provide an overview of how we build models which flag unusual traffic and keep our customers safe....
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October 02, 2024 1:00 PM
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 terab...
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September 11, 2024 4:00 PM
How the Harris-Trump US presidential debate influenced Internet traffic
See how the first 2024 US presidential debate between Kamala Harris and Donald Trump influenced Internet traffic patterns compared to the Biden-Trump debate. We also review email trends and observed attack activity....
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July 08, 2024 3:52 PM
French elections: political cyber attacks and Internet traffic shifts
Check the dynamics of the 2024 French legislative elections, the surprising election results’ impact on Internet traffic changes, and the cyber attacks targeting political parties...
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July 05, 2024 1:24 PM
UK election day 2024: traffic trends and attacks on political parties
Here, we explore the dynamics of Internet traffic and cybersecurity during the UK’s 2024 general election, highlighting late-day traffic changes and a post-vote attack on a political party...
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July 03, 2024 1:00 PM
First round of French election: party attacks and a modest traffic dip
How Cloudflare mitigated DDoS attacks targeting French political parties during the 2024 legislative elections, as detailed in our ongoing election coverage...
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June 21, 2024 3:25 PM
How the UEFA Euro 2024 football games are impacting local Internet traffic
Discover how UEFA Euro 2024 is shifting Internet traffic patterns during games across Europe with insights into traffic drops and cybersecurity concerns during national team games...
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June 10, 2024 3:27 PM
Exploring the 2024 EU Election: Internet traffic trends and cybersecurity insights
The 2024 EU Parliament election caused declines in Internet traffic during voting and spikes during results announcements, with persistent cyber threats targeting government sites...
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