A weakness or lack of a safeguard, which may be exploited by a threat, causing harm to the information systems or networks is called a ? 

Answer options:

A. Vulnerability
B. Risk
C. Threat
D. Overflow

The Answer: Vulnerability; Vulnerability is a weakness or lack of a safeguard, which may be exploited by a threat, causing harm to the information systems or

networks. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Pages 16, 32.