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TeamViewer 1E ClientLog timestamp tampering vulnerability in Content Distribution Service

Risk 27
Severity
6.5
EPSS
0.03%
Input Validation
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

A missing validation of a user-controlled value in the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to tamper with log timestamps via crafted UDP Sync command. This could result in forged or nonsensical datetime prefixes and compromising log integrity and forensic correlation.

Remedy

Update the TeamViewer DEX Client (1E Client) to the latest available version.
First published (updated )
CVE-2026-23570

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