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Microsoft Security Response CenterCVE-2026-70338

Microsoft PowerShell Security Feature Bypass Vulnerability

Improper control of generation of code ('code injection') 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 7.4
  • PowerShell 7.5
  • PowerShell 7.6

Versions the vendor lists as fixed

  • 7.4.19.0
  • 7.5.10.0
  • 7.6.5
Next step

What the vendor recommends

See the Microsoft Security Update Guide for the update that applies to your product.

Review the complete instructions on the vendor's site
Update history

What changed in later vendor updates

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

    • The vendor changed its remediation guidance.
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

  4. Confirmed at the source

    Our collector saw this advisory during a later source check.

Vulnerabilities

CVEs named in this advisory

CVE-2026-70338View CVSS, KEV, EPSS, and threat context
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