CVE-2026-23567
Unknown Unknown - Not Provided
Integer Underflow in TeamViewer NomadBranch UDP Causes DoS

Publication date: 2026-01-29

Last updated on: 2026-02-11

Assigner: TeamViewer Germany GmbH

Description
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.
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Meta Information
Published
2026-01-29
Last Modified
2026-02-11
Generated
2026-06-16
AI Q&A
2026-01-29
EPSS Evaluated
2026-06-15
NVD
CVE-2026-23567
EUVD
EUVD-2026-4985
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
teamviewer digital_employee_experience to 26.1 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
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Executive Summary

This vulnerability is an integer underflow in the UDP command handler of the TeamViewer DEX Client's Content Distribution Service (NomadBranch.exe) prior to version 26.1 on Windows. It allows an adjacent network attacker to send specially crafted UDP packets that trigger a heap-based buffer overflow, which can cause the service to crash (denial-of-service).

Impact Analysis

The vulnerability can cause a denial-of-service condition by crashing the affected service, potentially disrupting normal operations of the TeamViewer DEX Client on Windows systems.

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