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CVE-2026-26143

Microsoft - PowerShell

Microsoft CVSS 7.8 Updated April 16, 2026

Executive Risk Summary

"A vulnerability in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally, potentially leading to unauthorized access and system compromise. This vulnerability can be exploited by an attacker to execute malicious code on a vulnerable system."

Anticipated Attack Path

  1. 1. Initial Exploitation: Attacker sends malicious input to PowerShell
  2. 2. Privilege Escalation: Attacker bypasses security features to gain elevated access
  3. 3. Persistence and Lateral Movement: Attacker maintains access and moves laterally within the system

Am I Vulnerable?

  • Verify PowerShell version and patch level
  • Monitor system logs for suspicious activity
  • Implement additional security controls to restrict PowerShell access

Operational Audit Arsenal

Target Type Service
Target Asset powershell.exe
Standard Path C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PowerShell
# 🛠️ Senior Engineer Universal Audit
# Target: powershell.exe (Service)
$Targets = 'powershell.exe'
$SearchPaths = @("$env:windir\System32", "$env:ProgramFiles", "${env:ProgramFiles(x86)}")

Get-ChildItem -Path $SearchPaths -Include $Targets -Recurse -ErrorAction SilentlyContinue | 
Select-Object FullName, @{Name="Version";Expression={$_.VersionInfo.ProductVersion}}

Patch Impact Forecast

Reboot Required Unlikely

Minimal, as the patch only updates PowerShell components

Internal Work Notes

CVE-2026-26143: PowerShell vulnerability allowing unauthorized access and code execution. Implement patch and monitor system activity.

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Intelligence Sources

Related Microsoft Threats

Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.