ID:3881 - Exploit for Permissions, Privileges, and Access Controls in Steam - CVE-2015-7985

Link to public exploit:

Vulnerability description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Valve Steam 2.10.91.91 uses weak permissions (Users: read and write) for the Install folder, which allows local users to gain privileges via a Trojan horse steam.exe file.

Remediation