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Microsoft Security Response CenterCVE-2026-112989

Windows Servicing Stack Updates Elevation of Privilege Vulnerability

HighVendor CVSS 7.0 / 10 1 CVE Published Nov 10, 2026 at 8:00 AM UTC

Summary

Untrusted pointer dereference in Servicing Stack Updates allows an authorized attacker to elevate privileges locally.

Products covered

  • Windows 11 Version 24H2 for x64-based Systems

  • Windows 11 Version 24H2 for ARM64-based Systems

  • Windows 11 Version 25H2 for x64-based Systems

  • Windows 11 Version 25H2 for ARM64-based Systems

  • Windows 11 Version 26H2 for x64-based Systems

  • Windows 11 Version 26H2 for ARM64-based Systems

  • Windows Server 2025

  • Windows Server 2025 (Server Core installation)

Remediation

Install KB5132061. Install KB5131080.

Vendor-listed fixes

  • 10.0.26100.9974

  • 10.0.26200.9974

  • 10.0.26300.9974

  • 10.0.26100.33822

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.