CVE-2026-20931 HIGH

CVE-2026-20931: Windows Telephony Service Elevation of Privilege Vulnerability

Vendor Microsoft
Product Windows 10 Version 1607
Weakness CWE-73
Published January 13, 2026
Last update May 26, 2026
View on NVD All CVEs

CVSS base score

8.0/10
Attack vector Adjacent
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

January 13, 2026 CVE published
May 26, 2026 Record updated