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CVE-2020-0951

Windows Defender Application Control Security Feature Bypass Vulnerability

MEDIUM
6.7
CVSS Score
Published: September 11, 2020 at 05:08 PM UTC
Updated: June 17, 2026 at 02:47 AM UTC
15 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows 10

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Severity
MEDIUM6.7
Exploit prediction
EPSS 7%

Description

<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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

PowerShell· Microsoft
95%
7.0 ≤ v < 7.0.87.0.0 ≤ v < 7.0.87.1 ≤ v < 7.1.57.1.0 ≤ v < 7.1.57.0.07.0.87.1.0
Affected range stops below 7.0.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.1.5, so it looks safe — our inference, not a vendor statement
PowerShell Core· Microsoft
95%
All versions
Windows 10· Microsoft
95%
1607170918031809190319092004
Windows Server 2016· Microsoft
95%
10.0.0 ≤ v < publication10.0.0190319092004
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
Windows Server 2019· Microsoft
95%
10.0.0 ≤ v < publication10.0.0
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
Windows 10 1607· Microsoft
60%
10.0.0 ≤ v < publication10.0.0
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
Windows 10 1709· Microsoft
60%
10.0.0 ≤ v < publication10.0.0
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
Windows 10 1803· Microsoft
60%
10.0.0 ≤ v < publication10.0.0
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
Windows 10 1809· Microsoft
60%
10.0.0 ≤ v < publication10.0.0
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
Windows 10 1903· Microsoft
60%
10.0.0 ≤ v < publication10.0.0
Affected range stops below publication, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0951

CVSS

6.7MEDIUMmicrosoft
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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