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Microsoft Security Response CenterCVE-2026-108457

Microsoft Windows PDF Remote Code Execution Vulnerability

CriticalVendor CVSS 8.1 / 10 1 CVE Published Oct 13, 2026 at 7:00 AM UTC

Summary

Out-of-bounds write in Microsoft Windows PDF allows an unauthorized attacker to execute code over a network.

Products covered

  • Windows 11 Version 23H2 for x64-based Systems

  • Windows 10 Version 21H2 for ARM64-based Systems

  • Windows 10 Version 22H2 for x64-based Systems

  • Windows Server 2022 (Server Core installation)

  • Windows Server 2022

  • Windows 10 Version 21H2 for x64-based Systems

  • Windows 11 Version 23H2 for ARM64-based Systems

  • Windows 10 Version 21H2 for 32-bit Systems

Show 4 more products
  • Windows Server 2025 (Server Core installation)

  • Windows Server 2025

  • Windows 10 Version 22H2 for ARM64-based Systems

  • Windows 10 Version 22H2 for 32-bit Systems

Remediation

Install KB5126653. Install KB5126657. Install KB5126655. Install KB5126646.

Vendor-listed fixes

  • 10.0.22631.7652

  • 10.0.19044.7807

  • 10.0.19045.7807

  • 10.0.20348.5761

  • 10.0.26100.33650

CVEs in this advisory 1

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.

    • Added fixed versions: 10.0.19045.7807.

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.