On Saturday 6 September 2025 at 20:11 UTC, a search endpoint flood targeted a education platform customer in Iberia. The attack peaked at 514.0 million requests per second and lasted 32 minutes. Traffic originated from 693 autonomous systems in 46 countries, predominantly hijacked home routers.
| Vector | search endpoint flood |
| Peak | 514.0 million requests per second |
| Duration | 32 min |
| Time to mitigation | 0.769 s |
| Attack traffic reaching origin | 0.048% |
| Legitimate traffic challenged | 0.16% |
Timeline
The attack was preceded by no stated motive. Request rates on the targeted routes exceeded their hourly baseline by a factor of 162 within 18 seconds. The risk score of participating clients crossed the challenge threshold automatically and proof-of-work difficulty rose with origin load.
What the customer saw
A brief increase in p99 latency of 174 ms during the first minute, then normal service.
Recommendations
- Review allow-listed partner ranges quarterly.
- Lower challenge thresholds on authentication endpoints during high-risk events.
- Enable log streaming to your SIEM for faster correlation.
Clear and practical, thanks.