TeamViewer DEX Client up to 26.0 on Windows Content Distribution Service NomadBranch.exe cleartext transmission

CVSS Meta Temp Score
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CTI Interest Score
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4.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in TeamViewer DEX Client up to 26.0 on Windows. Affected by this vulnerability is an unknown functionality of the file NomadBranch.exe of the component Content Distribution Service. Performing a manipulation results in cleartext transmission. This vulnerability is known as CVE-2026-23564. Access to the local network is required for this attack. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in TeamViewer DEX Client up to 26.0 on Windows. It has been classified as problematic. This affects an unknown functionality of the file NomadBranch.exe of the component Content Distribution Service. The manipulation with an unknown input leads to a cleartext transmission vulnerability. CWE is classifying the issue as CWE-319. The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors. This is going to have an impact on confidentiality. The summary by CVE is:

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.

The weakness was published with Bank of America. The advisory is shared at teamviewer.com. This vulnerability is uniquely identified as CVE-2026-23564 since 01/14/2026. The exploitability is told to be difficult. The attack can only be done within the local network. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1040 for this issue.

Upgrading to version 26.1 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cleartext transmission
CWE: CWE-319 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: DEX Client 26.1

Timelineinfo

01/14/2026 CVE reserved
01/29/2026 +15 days Advisory disclosed
01/29/2026 +0 days VulDB entry created
01/29/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: teamviewer.com
Organization: Bank of America
Status: Confirmed

CVE: CVE-2026-23564 (🔒)
GCVE (CVE): GCVE-0-2026-23564
GCVE (VulDB): GCVE-100-343365

Entryinfo

Created: 01/29/2026 10:10
Changes: 01/29/2026 10:10 (66)
Complete: 🔍
Cache ID: 216::103

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