Which of the following describes the installation of software not approved by the organization?

The term "Non-approved Applications" accurately describes the installation of software that has not been sanctioned by the organization. This situation poses potential risks to the organization, such as security vulnerabilities, data breaches, and the introduction of malware, as unverified software may not adhere to the organization’s security protocols.

The focus on non-approved applications emphasizes the importance of adhering to established policies regarding which software can be installed and utilized within the organization's systems. By restricting the installation of software to only those that have been properly vetted and approved, organizations can minimize risks and maintain better control over their IT environments.

The other options relate to different concepts within cybersecurity. Unauthorized Network Access refers to gaining access to a network without permission, Account Masquerading involves one user impersonating another to gain unauthorized access, and Privilege Escalation pertains to a user gaining elevated access rights beyond what was originally granted. While these all represent potential security threats, they do not specifically address the issue of installing unapproved software.