On Wednesday 6 May 2026 at 01:51 UTC, a UDP reflection (NTP) targeted a education platform customer in the Nordics. The attack peaked at 360.9 Gbps and lasted 159 minutes. Traffic originated from 2952 autonomous systems in 14 countries, predominantly misconfigured open reflectors.
| Vector | UDP reflection (NTP) |
| Peak | 360.9 Gbps |
| Duration | 159 min |
| Time to mitigation | 0.459 s |
| Attack traffic reaching origin | 0.025% |
| Legitimate traffic challenged | 0.16% |
Timeline
The attack was preceded by a competitor’s product launch. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 24 points of presence.
What the customer saw
The customer’s status page stayed green throughout; they learned about the attack from our notification.
Recommendations
- Enable log streaming to your SIEM for faster correlation.
- Enable authenticated origin pulls.
- Lower challenge thresholds on authentication endpoints during high-risk events.