Search threats, CVEs… ⌘K
Back to vendor advisories
Microsoft Security Response CenterCVE-2026-26143

Microsoft PowerShell Security Feature Bypass Vulnerability

Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.

Read the vendor bulletin Get alerts for PowerShell
7.8CVSS out of 10High severity
Scope

What the vendor says is affected

  • PowerShell 7.5
  • PowerShell 7.4

Versions the vendor lists as fixed

  • 7.5.5
  • 7.4.14
Next step

What the vendor recommends

Release Notes

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-26143View CVSS, KEV, EPSS, and threat context
Keep investigating
See every advisory from this vendor