Which type of file sharing occurs when an employee shares a file with another user who then shares with other people who shouldn't have access?

"Ghost" file sharing is not a recognized or standard term for this specific scenario in cybersecurity.

"Trusted" file sharing implies that all parties involved are authorized and within policy, which is the opposite of the scenario described where unauthorized access occurs.

Promiscuous file sharing describes the uncontrolled spread of data beyond its intended recipients, often originating from an authorized user who then shares it with others, either accidentally or maliciously, leading to unauthorized access. This type of sharing breaks the chain of control over the data.

While the initial re-sharing might be accidental, the term "accidental" doesn't fully capture the subsequent uncontrolled spread to "other people who shouldn't have access," making "promiscuous" a more precise description of the broader outcome.