Carelessness or Negligence is lack of concern about the consequences of an action. The negligence may be a foreseeable action or a unintentionally, but in the both cases a person can be held responsible for any consequences of such negligence. Only humans can be negligence and this can cause damage to an organization's business systems, facilities, or personnel.
- A dissatisfied employee can stop to make updates in a server, leaving it vulnerable to attacks.
- Don't apply a patch to a known critical issue.
- Send a confidential e-mail to a wrong person.