CyberICT

CVE-2026-20931

Microsoft · Published January 13, 2026

CVSS v3.1

HIGH
Patch availableGet patch

Description

Windows Telephony Service Elevation of Privilege Vulnerability. External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.

Affected Products

  • 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)

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C