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Fencer Intel
medium 4.8

CVE-2016-5237 json

Valve Steam 3.42.16.13 uses weak permissions for the files in the Steam program directory, which allows local users to modify the files and…

published 2017-01-23 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-6188

cvss
4.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
1
Exploit-DB

Summary

Valve Steam 3.42.16.13 uses weak permissions for the files in the Steam program directory, which allows local users to modify the files and possibly gain privileges as demonstrated by a Trojan horse Steam.exe file.

Timeline

  1. First public exploit (EDB-39888)
  2. Published

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-39888 Valve Steam 3.42.16.13 - Local Privilege Escalation local, 2016-06-06
  • packetstormsecurity.com https://packetstormsecurity.com/files/137343/Valve-Steam-3.42.16.13-Local-Privilege-Escalation.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 4.8 CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
NVD 2.0 1.9 AV:L/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.