CVE-2019-17180

Name: CVE-2019-17180
Creator: NVD / NIST
Published: 2019-10-04T20:15:11.377+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.72%

Last modified Jun 17, 2026

CVE-2019-17180 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Valve Steam Client before 2019-09-12 allows placing or appending partially controlled filesystem content, as demonstrated by file modifications on Windows in the context of NT AUTHORITY\SYSTEM. This could lead to denial of service, elevation of privilege, or unspecified other impact.. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

Description

Valve Steam Client before 2019-09-12 allows placing or appending partially controlled filesystem content, as demonstrated by file modifications on Windows in the context of NT AUTHORITY\SYSTEM. This could lead to denial of service, elevation of privilege, or unspecified other impact.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.72%

49.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Valvesoftware	Steam Client	< 2019-09-12

References

https://amonitoring.ru/article/steam_vuln_3/Exploit, Third Party Advisory
https://habr.com/ru/company/pm/blog/469507/Exploit, Third Party Advisory
https://hackerone.com/reports/583184
https://hackerone.com/reports/682774Exploit, Third Party Advisory
https://store.steampowered.com/news/54236/Release Notes, Vendor Advisory
https://amonitoring.ru/article/steam_vuln_3/Exploit, Third Party Advisory
https://habr.com/ru/company/pm/blog/469507/Exploit, Third Party Advisory
https://hackerone.com/reports/583184
https://hackerone.com/reports/682774Exploit, Third Party Advisory
https://store.steampowered.com/news/54236/Release Notes, Vendor Advisory

Timeline

Published: Oct 4, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-17180?

How severe is CVE-2019-17180?

CVE-2019-17180 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.

How do I fix CVE-2019-17180?

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-2019-17180?

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

Scan your code now

Source: NVD / NIST