Log Injection Vulnerability in TeamViewer DEX Client for Windows
CVE-2026-23566

6.5MEDIUM

Key Information:

Vendor

Teamviewer

Status
Dex
Vendor
CVE Published:
29 January 2026

What is CVE-2026-23566?

A vulnerability in the TeamViewer DEX Client, specifically within the Content Distribution Service (NomadBranch.exe) for Windows, allows attackers on the same network to exploit the UDP network handler. By sending specially crafted data, they can manipulate log files, particularly the Nomad Branch.log. This can compromise the integrity of log entries, raising significant concerns regarding data authenticity and tracing actions back to their sources.

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Affected Version(s)

DEX Windows 0 < 26.1

References

https://www.teamviewer.com/en/resources/trust-center/secu...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Threat Hunt Team of Bank of America
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