{"cve":"CVE-2019-15316","nvd":{"published":"2019-08-21T20:15:12.930","modified":"2026-06-17T02:20:04.833","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.0},"cwes":["CWE-367","CWE-732"],"references":["https://amonitoring.ru/article/onemore_steam_eop_0day/","https://habr.com/ru/company/pm/blog/464367/","https://www.youtube.com/watch?v=I93aH86BUaE","https://www.youtube.com/watch?v=ZCHrjP0cMew","https://amonitoring.ru/article/onemore_steam_eop_0day/"],"products":["valvesoftware:steam_client"],"source":"nvd","synced_at":"2026-10-19T20:58:39.700375520+00:00"},"epss":{"cve":"CVE-2019-15316","score":0.00446,"percentile":0.38799,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}