Back to vendor advisories
Microsoft Security Response CenterCVE-2026-116700

Windows Telephony Service Elevation of Privilege Vulnerability

HighVendor CVSS 6.6 / 10 1 CVE Published Nov 10, 2026 at 8:00 AM UTC

Summary

Heap-based buffer overflow in Windows Telephony Service allows an authorized attacker to elevate privileges with a physical attack.

Products covered

  • Windows 10 Version 1607 for 32-bit Systems

  • Windows 10 Version 1607 for x64-based Systems

  • Windows Server 2016

  • Windows Server 2016 (Server Core installation)

  • Windows 10 Version 1809 for 32-bit Systems

  • Windows 10 Version 1809 for x64-based Systems

  • Windows Server 2019

  • Windows Server 2019 (Server Core installation)

Show 10 more products
  • Windows 10 Version 21H2 for 32-bit Systems

  • Windows 10 Version 21H2 for ARM64-based Systems

  • Windows 10 Version 21H2 for x64-based Systems

  • Windows 10 Version 22H2 for 32-bit Systems

  • Windows 10 Version 22H2 for ARM64-based Systems

  • Windows 10 Version 22H2 for x64-based Systems

  • Windows Server 2022

  • Windows Server 2022 (Server Core installation)

  • Windows 11 Version 23H2 for ARM64-based Systems

  • Windows 11 Version 23H2 for x64-based Systems

Remediation

Install KB5131291. Install KB5131085. Install KB5131096. Install KB5131090. Install KB5131087.

Vendor-listed fixes

  • 10.0.14393.9688

  • 10.0.17763.9487

  • 10.0.19044.7846

  • 10.0.19045.7846

  • 10.0.20348.5870

  • 10.0.22631.7711

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.