CUI Category: Information Systems Vulnerability Information - Homeland

a. DHS information technology internal systems data revealing infrastructure used for servers, desktops, and networks; application names, version, and release; switching, router, and gateway information; interconnections and access methods; mission or business use/need.  Examples of information are systems inventories and enterprise architecture models.  Information pertaining to national security systems and eligible for classification under Executive Order 13526 will be classified as appropriate.

b. Information regarding developing or current technology, the release of which could hinder the objectives of DHS, compromise a technological advantage or countermeasure, cause a denial of service, or provide an adversary with sufficient information to close, counterfeit, or circumvent a process or system.