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Microsoft Security Response CenterCVE-2026-103578

Windows Kernel Elevation of Privilege Vulnerability

HighVendor CVSS 6.8 / 10 1 CVE Published Oct 13, 2026 at 7:00 AM UTC

Summary

Untrusted pointer dereference in Windows Kernel allows an unauthorized attacker to elevate privileges with a physical attack.

Products covered

  • Windows 11 Version 26H1 for ARM64-based Systems

  • Windows 11 version 26H1 for x64-based Systems

Remediation

Install KB5127646.

Vendor-listed fixes

  • 10.0.28000.3231

CVEs in this advisory 1

Updates

  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.

  3. Confirmed at the source

    Our collector saw this advisory during a later source check.