In December 2025, the 33rd International Conference on Problems of Complex Systems Security Control took place at the Trapeznikov Institute of Control Sciences, the Russian Academy of Sciences (ICS RAS), Moscow. The conference was attended by 86 authors from 28 organizations, who presented 63 papers. The conference was divided into the following sections: 1. General theoretical and methodological issues of security support; 2. Problems of economic and sociopolitical security support; 3. Problems of information security support; 4. Cybersecurity. Security aspects in social networks; 5. Ecological and technogenic security; 6. Modeling and decision-making for complex systems security control; 7. Automated systems and means of complex systems security support.