CVE-2025-21333 is an elevation of privilege vulnerability in the Windows Hyper-V NT Kernel Integration VSP component. It allows an attacker with limited privileges to potentially gain higher privileges on the affected system. The vulnerability has a high severity score of 7.8 and impacts confidentiality, integrity, and availability. No specific affected versions or patches are provided in the available data. Public exploit code exists, but there are no known exploits in the wild at this time.