Vulnerability can be defined as:

A$.$ The potential for an unwanted outcome resulting from an incident, event, or occurrence.

B$.$ A natural or manmade occurrence, individual, entity, or action that has or indicates the potential to harm life, information, operations, the environment, and$/$or property.

C$.$ Physical features or operational attributes that render an entity open to exploitation or susceptible to a given hazard.

D$.$ The impact or effect of an event, incident, or occurrence.