EfficientLab Controlio before v1.3.95 contains a DLL hijacking vulnerability caused by weak folder permissions in the installation directory. A local attacker can place a specially crafted DLL in this directory and achieve arbitrary code execution with highest privileges, because the affected service runs as NT AUTHORITY\SYSTEM.
https://r.sec-consult.com/controlio
https://kb.controlio.net/hc/en-us/articles/45777908471185-Client-Update-April-15-2026-ver-1-3-95