What is CVE-2026-23564?

CVE-2026-23564 is a medium-severity vulnerability in Microsoft Windows, classified under Cleartext Transmission of Sensitive Information. CVSS score: 6.5/10. Published 2026-01-29.

How severe is CVE-2026-23564?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Microsoft Windows

CVE-2026-23564

A vulnerability in TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an attacker on the adjacent network to cause normally encrypted UDP traffic to be sent in cleartext. This can result in disclosure of sensitive information.

EPSS: 0.001 (3.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

psirt@teamviewer.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-23564?: CVE-2026-23564 is a medium-severity vulnerability in Microsoft Windows, classified under Cleartext Transmission of Sensitive Information. CVSS score: 6.5/10. Published 2026-01-29.
How severe is CVE-2026-23564?: Medium severity. CVSS v3 base score is 6.5 out of 10.