VULNERABILITY INTELLIGENCE

CVE-2020-15530

CVSS score7.8 HIGH
EPSS probability0.55%
CISA KEVNot currently listed
Published2020-07-05
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

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.

Weakness classification

  • nvd@nist.gov: CWE-362

Primary references