EPSS
Percentile
45.7%
Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation (to NT AUTHORITY\SYSTEM) via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition.
amonitoring.ru/article/onemore_steam_eop_0day/
habr.com/ru/company/pm/blog/464367/
www.youtube.com/watch?v=I93aH86BUaE
www.youtube.com/watch?v=ZCHrjP0cMew