A greylist in endpoint applications refers to a list of items that are not yet classified as either good (whitelisted) or bad (blacklisted). The primary function of a greylist is to hold applications, processes, or files that are under observation due to their unknown status. These items are neither trusted nor immediately flagged as harmful, allowing security teams to monitor them closely for any suspicious behavior. By placing items on a greylist, security operations can prevent potential threats without disrupting legitimate processes, awaiting further analysis to determine their true nature. Reference Cisco Cybersecurity Operations Fundamentals Endpoint Security Best Practices Greylisting Concepts in Cybersecurity