CVE-2019-17180: Valvesoftware Steam Client

High severity, CVSS 7.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Valvesoftware Steam Client: before 2019-09-12 (fixed in 2019-09-12)

Published 2019-10-04. Last modified 2026-06-17.