Ensuring the security of information technology (IT) systems is a vital aspect of today's business landscape. In a context where cyber threats are becoming more sophisticated and frequent, organizations need to be proactive in identifying and addressing potential vulnerabilities in their systems. One of the most effective methods to achieve this is through vulnerability scanning, a process designed to detect, categorize and prioritize security weaknesses in systems. In this article, we explore the world of vulnerability scanning, with a special focus on CompTIA certification.