VDB-343368 · CVE-2026-23565 · GCVE-0-2026-23565

TeamViewer DEX Client up to 26.0 on Windows Content Distribution Service NomadBranch.exe null pointer dereference

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in TeamViewer DEX Client up to 26.0 on Windows and classified as problematic. This vulnerability affects unknown code of the file NomadBranch.exe of the component Content Distribution Service. The manipulation results in null pointer dereference. This vulnerability was named CVE-2026-23565. The attack needs to be approached within the local network. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in TeamViewer DEX Client up to 26.0 on Windows. Affected is an unknown code of the file NomadBranch.exe of the component Content Distribution Service. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:

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 the NomadBranch.exe process to terminate via crafted requests. This can result in a denial-of-service condition of the Content Distribution Service.

The weakness was presented with Bank of America. The advisory is shared for download at teamviewer.com. This vulnerability is traded as CVE-2026-23565 since 01/14/2026. The exploitability is told to be easy. The attack needs to be initiated within the local network. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available.

Upgrading to version 26.1 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

TeamViewer

Name

DEX Client

Version

26.0

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

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-2026-23565 (🔒)
GCVE (CVE): GCVE-0-2026-23565
GCVE (VulDB): GCVE-100-343368

Entryinfo

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