CVE-2026-23567

An integer underflow in the UDP command handler of the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to trigger a heap-based buffer overflow and cause a denial-of-service (service crash) via specially crafted UDP packets.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:teamviewer:digital_employee_experience:*:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

History

17 Jun 2026, 10:21

Type	Values Removed	Values Added
Summary		(es) Un desbordamiento inferior de entero en el manejador de comandos UDP del Cliente TeamViewer DEX (anteriormente Cliente 1E) - Servicio de Distribución de Contenido (NomadBranch.exe) anterior a la versión 26.1 para Windows permite a un atacante de red adyacente activar un desbordamiento de búfer basado en montículo y causar una denegación de servicio (caída del servicio) mediante paquetes UDP especialmente diseñados.

11 Feb 2026, 20:08

Type	Values Removed	Values Added
First Time		Teamviewer digital Employee Experience Teamviewer Microsoft Microsoft windows
CPE		cpe:2.3:o:microsoft:windows:-:::::::* cpe:2.3:a:teamviewer:digital_employee_experience::::::::
References	~~() https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/ -~~	() https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/ - Vendor Advisory

29 Jan 2026, 09:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-01-29 09:16

Updated : 2026-06-17 10:21

NVD link : CVE-2026-23567

Mitre link : CVE-2026-23567

CVE.ORG link : CVE-2026-23567

JSON object : View

Products Affected

microsoft

windows

teamviewer

digital_employee_experience

CWE

CWE-122

Heap-based Buffer Overflow

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