OUTAGE ANALYSIS
Cloudflare Outage Analysis: November 18, 2025

Outage Analyses

Cloudflare Outage Analysis: December 5, 2025

By Internet Research Team
| | 1 min read

Summary

On December 5, Cisco ThousandEyes observed a global outage affecting cloud and CDN provider Cloudflare, impacting multiple Internet services. See how the outage unfolded in this analysis—more updates will be added as we have them.


[December 5, 2025, 10:00 AM PST] 

Starting at approximately 8:48 UTC, ThousandEyes detected an outage impacting Cloudflare customers. Services hosted by the CDN and cloud provider began returning 500 web server errors similar to the Nov. 18 widespread outage. The incident, which impacted users globally, appeared to resolve after around 20 minutes at ~9:10 UTC. 


Explore the outage within the ThousandEyes platform (no login required). 

Figure 1. Sample service impacted by the outage.
Figure 1. Sample service impacted by the outage.

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