CVE-2020-0951
highpriority · track · 31EPSS 0.066 · 94 %ileEURUUSEPSS · scored 2026-10-27
<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>
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.1–7.2
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (51)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- BIT-powershell-2020-0951Windows Defender Application Control Security Feature Bypass Vulnerability2025-09-04vendor · osvUS
<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>
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- http://www.nsfocus.net/vulndb/49947cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2020-0951cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0951cnnvd
- https://portal.msrc.microsoft.com/en-us/security-guidancePatchcnnvd
- https://portal.msrc.microsoft.com/zh-CN/security-guidance/advisory/CVE-2020-0951cnnvd
- https://vigilance.fr/vulnerability/Microsoft-Windows-vulnerabilities-of-September-2020-33277cnnvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0951enisa_euvd
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0951PatchVendor Advisorynvd
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