The article presents a comprehensive examination of the Russian Federation’s use of United Nations (UN) mechanisms to advance its geopolitical objectives, obstruct international initiatives that contradict its policy, and wage information and psychological warfare. The analysis indicates that the Russian Federation’s participation in the UN Security Council lacks a clear legal foundation, raising questions about the legitimacy of its use of veto power’. It is documented that Russia systematically uses this privilege to veto resolutions aimed at condemning its aggression and investigating war crimes, thereby prolonging the war and evading accountability. Significant attention is given to Russia’s manipulation of UN peacekeeping operations, which it seeks to exploit to consolidate control over occupied territories. The study emphasizes Russia’s information and psychological operations within the UN, which facilitate the spread of disinformation, undermine trust in international institutions, and adversely influence state voting on critical resolutions in the General Assembly. The results obtained illustrate the necessity of revamping the UN decision-making mechanism, particularly by limiting aggressor states’ ability to exercise the veto in their own interests. Proposed procedural reforms aim to enhance the UN’s effectiveness in maintaining peace and safeguarding international security.