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 cl…

EPSS: 0.001 (3.2th 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

Microsoft Windows
Teamviewer Dex — versions 0
Teamviewer Digital_employee_experience

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.