Safeguarding Against Subdomain Takeover

This article describes subdomain takeover — a condition where DNS entries (e.g., dangling CNAMEs) point to decommissioned third‑party services that attackers can claim to host malicious content — outlines common misconfiguration scenarios, real-world impacts (phishing, credential theft, brand damage), and provides mitigation guidance including DNS audits, automated detection, hygiene practices, and governance.