<ul data-eligibleForWebStory="false"><li>Dangling DNS occurs when a DNS record still points to a cloud service that has been deleted, leaving the record 'dangling.'</li><li>Attackers can exploit dangling DNS by claiming the deleted resource name and hosting malicious content under the subdomain, leading to brand impersonation, data theft, and phishing.</li><li>An example scenario is deleting an Azure App Service but forgetting to remove the CNAME record, allowing an attacker to claim the resource name and redirect traffic.</li><li>To prevent dangling DNS, it is crucial to clean up DNS records when deleting cloud services, audit DNS regularly, use monitoring tools, and enable ownership validation on platforms that support it.</li></ul>

What is Dangling DNS? (And How It Can Lead to Domain Takeovers)

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