Valve Steam Client before 2019-09-12 allows placing or appending partially controlled…
Priority LOW 35CWE-22Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.00717 54th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:valvesoftware:steam_client:*:*:*:*:*:*:*:* | before 2019-09-12 | Vulnerable | Valvesoftware |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:valvesoftware:steam_client:*:*:*:*:*:*:*:* Versions before 2019-09-12 Vulnerable ·Valvesoftware
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-17180
- 2026-10-03 Alias added: GHSA-mwv8-pr5j-j6w9
References
More Valvesoftware Steam Client vulnerabilities
- TI-2021-10883 Valve Steam before 2021-04-17, when a Source engine game is installed, allows remote… CVSS 3.1CRITICAL 9.0
- TI-2020-12227 An issue was discovered in Valve Steam Client 2.10.91.91. CVSS 3.1HIGH 7.8
- TI-2019-11419 Valve Steam Client for Windows through 2019-08-16 allows privilege escalation (to NT… CVSS 3.0HIGH 7.8
- TI-2015-06635 Valve Steam 2.10.91.91 uses weak permissions (Users: read and write) for the Install… CVSS 2.0HIGH 7.2
- TI-2019-11420 Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to… CVSS 3.0HIGH 7.0
- TI-2019-10955 In Valve Steam Client for Windows through 2019-08-07… CVSS 3.0MEDIUM 6.6
Sources
- CVE-2019-17180 · CVE Program
- CVE-2019-17180 · NVD
- FIRST EPSS
- GHSA-mwv8-pr5j-j6w9 · GitHub Advisory Database · CC BY 4.0
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