Which of the following may be considered a cyber vulnerability to DoD systems?

The correct answer encompasses a comprehensive view of potential cyber vulnerabilities to Department of Defense (DoD) systems. Each of the listed factors contributes significantly to the risk landscape:

Disgruntled or co-opted employees represent a significant insider threat, as individuals with access to sensitive information can exploit their knowledge, either out of malice or coercion. Their familiarity with the system may allow them to bypass security protocols and cause substantial damage or data breaches.

Weak passwords are a well-documented vulnerability, as they can easily be compromised through various means, such as social engineering or brute-force attacks. Inadequate password policies can lead to unauthorized access, jeopardizing the integrity of sensitive systems and data.

Viruses and other types of malware pose significant external threats. They can infiltrate systems, disrupt operations, and lead to data loss or theft. Malware can exploit vulnerabilities within applications or networks, often spreading rapidly and compromising system security.

By considering all these factors collectively, it becomes clear that the statement recognizes the multifaceted nature of cyber vulnerabilities, emphasizing the importance of safeguarding against all potential points of exploitation in DoD systems.