www.securityweek.com 5/23/2026, 11:10:26 AM · external

Underminr CDN flaw exposes 88 million domains in US, UK, Canada

Underminr CDN flaw exposes 88 million domains in US, UK, Canada
CyberSIXT Evidence Panel
Primary Source underminr.ai

THE article discusses a cybersecurity vulnerability called 'Underminr', which exploits shared content delivery networks (CDNs) to disguise connections to malicious domains. This method is seen as an evolution of domain fronting, where attackers can navigate through trusted domains to reach unauthorized ones without detection. Approximately 88 million domains could be affected, particularly in the US, UK, and Canada.

The vulnerability allows for hiding command-and-control servers, impacting network security measures. The potential rise of AI-driven attacks using Underminr is anticipated.

View Primary Source Via www.securityweek.com

Article by CyberSIXT

Timeline Coverage

Swipe to explore timeline