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Azure DNS Behavior Can Turn Private Endpoints Into DoS Risks

Summary by eSecurityPlanet
A subtle design limitation in Microsoft Azure’s Private Endpoint implementation is creating an unexpected denial-of-service (DoS) risk for cloud environments that rely heavily on Private Link for secure connectivity. Azure’s DNS behavior with Private Endpoints and Private DNS zones across multiple virtual networks (VNETs) can break name resolution, causing outages even when the service and its public endpoint are still functioning. The flaw “… c…
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eSecurityPlanet broke the news in on Wednesday, January 21, 2026.
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