CVE-2020-15530

An issue was discovered in Valve Steam Client 2.10.91.91. The installer allows local users to gain NT AUTHORITY\SYSTEM privileges because some parts of %PROGRAMFILES(X86)%\Steam and/or %COMMONPROGRAMFILES(X86)%\Steam have weak permissions during a critical time window. An attacker can make this time window arbitrarily long by using opportunistic locks.

• CWE-362

• http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.htmlExploit, Third Party Advisory
• http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.htmlExploit, Third Party Advisory

Published

Jul 5, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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