What is CVE-2026-40400?

CVE-2026-40400 is a security advisory published by Microsoft Security Response Center (MSRC). Windows PowerShell Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-40400 cover?

CVE-2026-40400 covers the following CVE IDs: CVE-2026-40400. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

CVE-2026-40400

Vendor

Published

July 17, 2026

Last Modified

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Relative path traversal in Windows PowerShell allows an authorized attacker to execute code over a network.