MITRE has released the 2019 Common Weakness Enumeration (CWE) Top 25 Most Dangerous Software Errors list. It is a compilation of the most frequent and critical errors that can lead to serious vulnerabilities in software. MITRE notes these weaknesses are often easy to find and exploit and are dangerous because they frequently allow adversaries to completely take over execution of software, steal data, or prevent the software from working. Access the list at MITRE.
The Cybersecurity and Infrastructure Security Agency (CISA) encourages users and administrators to review the list and evaluate recommended mitigations to determine those most suitable to adopt.