CVE-2020-0951: Microsoft PowerShell

Medium severity, CVSS 6.7. EPSS: 6.6% chance of exploitation in the next 30 days.

<p>A security feature bypass vulnerability exists in Windows Defender Application Control (WDAC) which could allow an attacker to bypass WDAC enforcement. An attacker who successfully exploited this vulnerability could execute PowerShell commands that would be blocked by WDAC.</p> <p>To exploit the vulnerability, an attacker need administrator access on a local machine where PowerShell is running. The attacker could then connect to a PowerShell session and send commands to execute arbitrary code.</p> <p>The update addresses the vulnerability by correcting how PowerShell commands are validated when WDAC protection is enabled.</p>

Affected products

  • Microsoft PowerShell: from 7.0, before 7.0.8 (fixed in 7.0.8); from 7.1, before 7.1.5 (fixed in 7.1.5); version 7.0.8 only
  • Microsoft Windows 10: version 1607 only; version 1709 only; version 1803 only; version 1809 only; version 1903 only; version 1909 only; …
  • Microsoft Windows Server 2016: affected versions not specified; version 1903 only; version 1909 only; version 2004 only
  • Microsoft Windows Server 2019: affected versions not specified

Published 2020-09-11. Last modified 2026-06-17.