Security readout for executives and security teams
Plain-English summary
This CVE describes weak file permissions in Valve Steam 3.42.16.13. A local user could modify files in Steam’s program directory and potentially gain higher privileges by replacing Steam components. This is primarily an endpoint hardening issue, not a remote internet-facing flaw.
Executive priority
Treat this as a moderate endpoint risk. Prioritize shared or unmanaged workstations where local users can tamper with installed applications. It is less urgent than remotely exploitable flaws, but weak permissions can turn limited access into broader compromise.
Technical view
The reported issue is a local privilege escalation caused by writable files in the Steam installation directory. Public references describe replacing Steam.exe as the demonstrated impact. The CVE has no CVSS, no CWE, and the provided affected-product metadata is incomplete beyond the Steam version named in the description.
Likely exposure
Exposure is likely limited to systems with Valve Steam 3.42.16.13 installed where standard users can write to the program directory. Shared Windows workstations, unmanaged user devices, labs, or gaming/creator endpoints are more plausible than servers.
Exploitation context
Public exploit references exist in Packet Storm and Exploit-DB, but the source bundle does not show CISA KEV listing or active exploitation evidence. The attack requires local access or an already-compromised user context.
Researcher notes
Evidence is sparse: no CVSS, CWE, vendor advisory, or patch details are included in the bundle. The structured affected list is generic, while the description names Valve Steam 3.42.16.13. Avoid broad product assumptions beyond that version.
Mitigation direction
- Identify endpoints running the named Steam version.
- Check Valve guidance and update Steam through trusted channels.
- Ensure standard users cannot write to Steam’s program directory.
- Reinstall from trusted media if Steam binaries may be modified.
- Use endpoint controls to monitor unexpected Steam binary changes.
Validation and detection
- Inventory installed Steam versions across managed endpoints.
- Review Steam program directory permissions for standard-user write access.
- Verify Steam executables match trusted vendor-installed versions.
- Check endpoint telemetry for unexpected Steam.exe replacement or modification.
- Confirm remediation after updating or reinstalling affected systems.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2016-5237 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://packetstormsecurity.com/files/137343/Valve-Steam-3.42.16.13-Local-Privilege-Escalation.htmlCVE reference · x_refsource_MISC
- 39888CVE reference · exploit, x_refsource_EXPLOIT-DB
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.