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CVE-2019-15316
Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation (to NT AUTHORITY\SYSTEM)…
High7.0EPSS 0.45%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.0 | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.45% · top 61% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.
Weakness
Affected products
n/a
- affected n/a
References (4)
- https://amonitoring.ru/article/onemore_steam_eop_0day/ (opens in a new tab)x_refsource_MISCx_transferred
- https://habr.com/ru/company/pm/blog/464367/ (opens in a new tab)x_refsource_MISCx_transferred
- https://www.youtube.com/watch?v=I93aH86BUaE (opens in a new tab)x_refsource_MISCx_transferred
- https://www.youtube.com/watch?v=ZCHrjP0cMew (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-15316)Record last updated .