CVE-2019-15315

Name: CVE-2019-15315
Creator: NVD / NIST
Published: 2019-08-21T20:15:12.853+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.39%

Last modified Jun 17, 2026

CVE-2019-15315 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

0.39%

30.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-732

Affected Software

Vendor	Product	Versions
Valvesoftware	Steam Client	<= 2019-08-16

References

https://xiaoyinl.github.io/steam_EoP_bypass.htmlThird Party Advisory
https://xiaoyinl.github.io/steam_EoP_bypass.htmlThird Party Advisory

Timeline

Published: Aug 21, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-15315?

How severe is CVE-2019-15315?

Severity scoring for CVE-2019-15315 is pending analysis. The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2019-15315?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-15315?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST