The Windows Server 2025 "Perform volume maintenance tasks" user right must only be assigned to the Administrators group.
Inappropriately granting user rights provides system, administrative, and other high-level capabilities.
Accounts with the "Perform volume maintenance tasks" user right can manage volume and disk configurations. This could be used to delete volumes, resulting in data loss or a denial of service.
How this relates to the STIG checklist: STIG vs SCAP benchmark.