Tajni podatki EU se lahko ogrozijo kot posledica nepazljivosti, malomarnosti ali indiskretnosti, pa tudi zaradi dejavnosti služb, ki imajo za cilj EU ali njene države članice glede tajnih podatkov in dejavnosti EU, ali zaradi uničevalnih organizacij.
EU classified information may be compromised as a result of carelessness, negligence or indiscretion as well as by the activities of services which target the EU or its Member States, as regards EU classified information and activities, or by subversive organisations.