A vulnerability scanner is a software tool designed to identify security weaknesses in computer systems, networks, and applications. By scanning for known vulnerabilities, these tools help organizations detect potential threats before they can be exploited by attackers. They often provide detailed reports on the vulnerabilities found, along with recommendations for remediation. These scanners can be used in various environments, including web applications, network devices, and cloud services. Regular use of vulnerability scanners is an essential part of a comprehensive security strategy, helping organizations maintain a strong defense against cyber threats and protect sensitive data.