The aspects of analysis of modern cyber threats and their stability and reliability problems in Internet of Things devices, as well as stability risks of Internet of Things devices arising in modern personal users devices and Industrial Internet of Things systems, were considered in this paper. The main factors of influencing of the informational intrusions, data stability and also the consequences of their successful manifestation are considered in these papers. The approaches of more stable and secure decision for data environments in IoT were proposed. Development prospects and an approach to reliability assessment of Internet of Things systems and personal users devices are considered.