A newly disclosed vulnerability in shared Content Delivery Network (CDN) infrastructure, dubbed “Underminr,” hides malicious connections behind trusted, high-reputation domains, effectively defeating Protective DNS (PDNS) filtering at scale. Disclosed on May 21, 2026, by Canadian zero-trust firm ADAMnetworks, Underminr is an evolution of the legacy domain fronting technique that major CDN providers largely mitigated by […]
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