CVE-2019-15315

Valve Steam Client for Windows through 2019-08-16 allows privilege escalation (to NT AUTHORITY\SYSTEM) because local users can replace the current versions of SteamService.exe and SteamService.dll with older versions that lack the CVE-2019-14743 patch.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 8%
VendorProductVersion
valvesoftwaresteam_client
𝑥
≤ 2019-08-16
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://xiaoyinl.github.io/steam_EoP_bypass.html
https://xiaoyinl.github.io/steam_EoP_bypass.html