On Monday 27 July 2026 at 07:25 UTC, a SYN flood targeted a video streaming customer in the Nordics. The attack peaked at 10.6 Gbps and lasted 40 minutes. Traffic originated from 2026 autonomous systems in 93 countries, predominantly compromised cloud VMs.
| Vector | SYN flood |
| Peak | 10.6 Gbps |
| Duration | 40 min |
| Time to mitigation | 0.518 s |
| Attack traffic reaching origin | 0.004% |
| Legitimate traffic challenged | 0.70% |
Timeline
The attack was preceded by a publicly announced sales event. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 20 points of presence.
What the customer saw
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Review allow-listed partner ranges quarterly.
- Enable log streaming to your SIEM for faster correlation.
- Add a dedicated rate limit for the targeted route.