Abstract—Global DNS infrastructure is a major component for the services exposed in the internet. The purpose of the study is understanding the cyber security status of DNS ecosystem. As part of the research, a statistical analysis based on vulnerability repositories has been created to provide a view toward the level of DNS security in general. It can help organizations to understand, assess and mitigate DNS risks. It's made short review of most used attacks against DNS and mitigation: amplification, reflection, floods, DNS exploits, and analysis for the DNS security incidents trend. The statistics implicitly reflect the degree of adoption of new DNS security standards and technologies.