CVE-2019-15315

7.8 highEPSS 0.4%

High (7.8) in valvesoftware steam client. EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.0

7.8 high

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 35% of CVEs (scores of 2026-10-31)
CWE: CWE-732
Published: 2019-08-21
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

valvesoftware:steam_client

References

https://xiaoyinl.github.io/steam_EoP_bypass.html
https://xiaoyinl.github.io/steam_EoP_bypass.html

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