{"id":"CVE-2019-15316","aliases":["EUVD-2019-6317","GHSA-x7v3-vhf3-7wrh"],"status":"published","title":"Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to...","description":"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.","severity":{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00446,"percentile":0.39029,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-367","CWE-732"],"published":"2019-08-21T19:36:06Z","modified":"2026-06-17T02:20:04Z","products":[{"vendor":"valvesoftware","product":"steam_client"}],"references":[{"url":"https://amonitoring.ru/article/onemore_steam_eop_0day/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://habr.com/ru/company/pm/blog/464367/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://www.youtube.com/watch?v=I93aH86BUaE","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://www.youtube.com/watch?v=ZCHrjP0cMew","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-15316"},{"url":"https://github.com/advisories/GHSA-x7v3-vhf3-7wrh"}],"sources":{"cve":[{"id":"CVE-2019-15316","description":"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.","status":"published","published":"2019-08-21T19:36:06Z","modified":"2024-08-05T00:42:03.701Z","updated_at":"2026-11-02T14:20:21.703364Z"}],"euvd":[{"id":"EUVD-2019-6317","description":"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.","status":"published","published":"2019-08-21T19:36:06Z","modified":"2024-08-05T00:42:03Z","updated_at":"2026-11-03T02:40:37.184704Z"}],"ghsa":[{"id":"GHSA-x7v3-vhf3-7wrh","title":"Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to...","description":"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.","status":"published","published":"2022-05-24T16:54:24Z","modified":"2023-01-28T05:06:30Z","updated_at":"2026-11-02T14:44:26.339775Z"}],"nvd":[{"id":"CVE-2019-15316","description":"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.","status":"published","published":"2019-08-21T20:15:12.93Z","modified":"2026-06-17T02:20:04.833Z","cvss":[{"version":"3.0","score":7,"vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.9,"vector":"AV:L/AC:M/Au:N/C:C/I:C/A:C","level":"medium","assessor":"primary"}],"cwes":["CWE-367","CWE-732"],"updated_at":"2026-11-02T14:05:23.725587Z"}]}}