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Cloudflare Down: Websites and Services to Go Down on November 18, 2025

Cloudflare Down: Websites and Services to Go Down on November 18, 2025

18 November 2025 13:20

The morning of November 18, 2025, will be remembered as one of the most anomalous and widespread outages on the Cloudflare network in recent months. The CDN—the beating heart of millions of websites, applications, and API services—began experiencing cascading outages across several geographic areas, significantly impacting our site, Red Hot Cyber , which uses Cloudflare infrastructure for CDN, caching, and DDoS protection.

The following notice has been posted on the Cloudflare System Status portal:


11:48 UTC: “Cloudflare is aware of, and investigating an issue which potentially impacts multiple customers.”
12:03 UTC: “We are continuing to investigate this issue.”

Downdetector also down

One of the most unusual elements is the fact that Downdetector , a platform used to check for outages and anomalies on major services, is also unreachable or with extremely slow loading times.
This made it more difficult to monitor the spike in user reports, creating an information domino effect: many users couldn’t even verify which services were actually offline, increasing the perception of a widespread blackout.

A global flaw without explanation

The cause of the incident remains completely unknown at this time. Cloudflare has not yet released technical details, and the lack of precise information opens up several possible scenarios:

  • Possible global backbone instability , but not confirmed.
  • Anomaly in internal routing systems (e.g. BGP) , which has caused similar effects in the past.
  • Configuration error on a core cluster , a common occurrence in large providers.
  • Targeted attack , although there are no obvious signs, and Cloudflare has not indicated it as a probable cause.
  • Large-scale failure of edge locations , which would have an immediate impact on static sites and protected APIs.

The simultaneity with the Downdetector crash, furthermore, suggests that the problem may have affected not only content served via Cloudflare, but also other critical nodes in the public monitoring ecosystem.

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The editorial staff of Red Hot Cyber is composed of IT and cybersecurity professionals, supported by a network of qualified sources who also operate confidentially. The team works daily to analyze, verify, and publish news, insights, and reports on cybersecurity, technology, and digital threats, with a particular focus on the accuracy of information and the protection of sources. The information published is derived from direct research, field experience, and exclusive contributions from national and international operational contexts.