CVE-2026-20931

HIGH

8.0

Description

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

CVE Details

CVSS v3.1 Score8.0

SeverityHIGH

CVSS VectorCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorADJACENT_NETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published1/13/2026

Last Modified1/16/2026

Sourcenvd

Honeypot Sightings0

Affected Products

microsoft:windows_10_1607microsoft:windows_10_1809microsoft:windows_10_21h2microsoft:windows_10_22h2microsoft:windows_11_23h2microsoft:windows_11_24h2microsoft:windows_11_25h2microsoft:windows_server_2008microsoft:windows_server_2012microsoft:windows_server_2016microsoft:windows_server_2019microsoft:windows_server_2022microsoft:windows_server_2022_23h2microsoft:windows_server_2025

Weaknesses (CWE)

CWE-73

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20931(secure@microsoft.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.