HIGH 8.0 Microsoft

CVE-2026-40400

Windows PowerShell Remote Code Execution Vulnerability

Microsoft Security Update 2026-Jul: Windows PowerShell Remote Code Execution Vulnerability

Affected Products

PowerShell 7.5
PowerShell 7.6
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server 2022
Windows 10 Version 21H2 for 32-bit Systems

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40400
https://nvd.nist.gov/vuln/detail/CVE-2026-40400

Published: 2026-07-14 · Source: Microsoft · Feed updated: 2026-09-18

This high severity vulnerability with a CVSS score of 8.0 was published on 2026-07-14 via Microsoft. Affected: PowerShell 7.5, PowerShell 7.6, Windows 10 Version 1809 for 32-bit Systems and 5 more.

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