Elevation of Privilege in Windows Storage VSP Driver

Successful exploitation allows a local authorized attacker to elevate privileges on the affected Windows system. Based on the supplied context, this is a post-compromise/local privilege escalation issue that could be used to obtain higher privileges, potentially up to SYSTEM, and therefore facilitate full host compromise when chained with an initial access vector or code execution foothold.

No specific vendor mitigation or workaround for CVE-2025-59516 is provided in the supplied content. In the absence of a patch, reduce exposure by limiting local code execution opportunities, restricting user privileges, hardening application execution paths, and monitoring for suspicious privilege-escalation activity involving kernel/driver components. Because this is a local authorized-attacker issue, preventing initial compromise and minimizing local execution rights are the primary compensating controls currently available from the provided information.

Apply the Microsoft December 2025 security updates that address CVE-2025-59516 for affected Windows versions. The supplied content identifies this CVE as fixed in Microsoft’s December 9, 2025 Patch Tuesday release. Standard remediation is deployment of the relevant cumulative/security update for the affected Windows release through normal Microsoft update channels.