A vulnerability refers to a known weakness of an asset (resource) that can be exploited by one or more attackers. In other words, it is a known issue that allows an attack to succeed.
For example, when a team member resigns and you forget to disable their access to external accounts, change logins, or remove their names from company credit cards, this leaves your business open to both intentional and unintentional threats. However, most vulnerabilities are exploited by automated attackers and not a human typing on the other side of the network.
Testing for vulnerabilities is critical to ensuring the continued security of your systems. Identify the weak points.  Discuss at least four questions to ask when determining your security vulnerabilities.