Which of the following best describes a confirmed security violation?

A confirmed security violation is best described by willful negligence in handling classified information. This involves intentional disregard for established security protocols and procedures that are designed to protect sensitive data. In the context of security practices within the Department of Defense, such negligence indicates a conscious choice to ignore or violate rules that are critical to safeguarding information and ensuring compliance with regulations.

Understanding this context is essential because it highlights the seriousness of willfully neglecting responsibilities related to classified information, which could lead to unauthorized disclosures or breaches of national security.

In contrast, the other options reflect various security incidents or failures but do not encapsulate the element of intentional action that characterizes a confirmed security violation. The failure to return classified documents and incorrect filing of security documentation may represent administrative errors, while the loss of physical access to secure facilities could stem from procedural mistakes rather than a conscious violation of security protocols.