CVE-2026-23564 | BDVDB-2026-312985 Detail

TeamViewerDEX

Description#

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.

Impact#

CAPEC-220 Client-Server Protocol Manipulation

Weaknesses#

CWE-319 Cleartext Transmission of Sensitive Information

References#

https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/

Exploit#

No public exploit known

History#

Version 12026-01-29Record published in the CVE List.

Published

Published: 2026-01-29
Last modified: 2026-01-29

Vendor information

Vendor: TeamViewer
Product: DEX

All TeamViewer vulnerabilities

Score

6.5 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 2.6.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 26.1
Fixed
26.1

Scoring System

CVSS v4.0

Not available

CVSS v3.1

6.5 Medium

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

Metric breakdown
Attack Vector	Adjacent
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	None
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).