The MODAPI.sys driver in MSI Dragon Center 2.0.104.0 exposes functionality that allows low-privileged users to write an arbitrary value to a Model-Specific Register (MSR) at the specified address via specially crafted IOCTL requests.
The vulnerability has been dubbed PrintNightmare and is tracked as CVE-2021-34527. The flaw is due to the Windows Print Spooler service improperly performing privileged file operations. Microsoft says the flaw can be exploited by an authenticated user calling RpcAddPrinterDriverEx(). When exploited, an attacker gains SYSTEM privileges and can execute arbitrary code, install programs, view, change, or delete data or create new accounts with full user rights.