What is CVE-2025-46266?

CVE-2025-46266 is a medium-severity vulnerability in Microsoft Windows, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2025-12-11.

How severe is CVE-2025-46266?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Improper input validation in Microsoft Windows

CVE-2025-46266

A vulnerability in TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 25.11 for Windows allows malicious actors to coerce the service into transmitting data to an arbitrary internal IP address, potentially leaking sensitive information.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.002 (12.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

psirt@teamviewer.com (Vendor Advisory)

Frequently asked questions

What is CVE-2025-46266?: CVE-2025-46266 is a medium-severity vulnerability in Microsoft Windows, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2025-12-11.
How severe is CVE-2025-46266?: Medium severity. CVSS v3 base score is 4.3 out of 10.