AUGUST 4, 2026
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Case File

CVE-2020-15530

HIGH · CVSS 7.8 EPSS 0.52%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-07-05 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.8. See the original NVD description below for full technical details.

CVE
CVE-2020-15530
Severity
HIGH
CVSS
7.8
EPSS
0.52%

Original NVD 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.

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