Simply put, a software vulnerability is an error or defect in software. Threat actors and hackers love to scan networks, systems, applications, and software to find vulnerabilities so that they could perhaps use them to gain control of the system or software. Vulnerabilities stem from the way the software is designed. For example, there could be a flaw in the way the application or software was coded, errors could have appeared in a software update or release unexpectedly, or code errors could have been injected inadvertently when first- or third-party code was added to the software or application.