TeamViewer security advisory (AV25-861)

Serial number: AV25-861
Date: December 23, 2025

On December 11, 2025, TeamViewer published security advisories to address vulnerabilities in the following products:

• TeamViewer DEX Client – NomadBranch.exe – versions prior to 1E Client 25.11.0.29
• TeamViewer DEX Client – NomadBranch.exe – versions prior to 1E Client 25.9.0.46 - HF-PLTPKG-524 (Hotfix)
• TeamViewer DEX Client – NomadBranch.exe – versions prior to 1E Client 25.5.0.53 - HF-PLTPKG-526 (Hotfix)
• TeamViewer DEX Client – NomadBranch.exe – versions prior to 1E Client 24.5.0.69 - HF-PLTPKG-525 (Hotfix)
• TeamViewer DEX – multiple versions

The Cyber Centre encourages users and administrators to review the provided web links and perform the suggested mitigations.

• Improper input validation in TeamViewer
• Command Injection and Privilege Escalation vulnerabilities in TeamViewer
• TeamViewer Trust Center