5 Common DNS Vulnerabilities and How to Protect Your Network

This article reviews five critical DNS security weaknesses (open resolvers, missing DNSSEC, poor server configuration, insufficient monitoring/logging, and vulnerable protocols), explains associated impacts such as data exfiltration via DNS tunneling, DDoS via DNS amplification, and reputational damage from hijacking, and recommends mitigations including DNSSEC, encrypted DNS (DoH/DoT), hardening, monitoring, and tooling (e.g., PowerDMARC, Cisco Umbrella). It also highlights emerging concerns like AI-driven DNS attacks and zero-day DNS exploits.