PT-2026-5254 · 1E Client+1 · 1E Client+1

CVE-2026-23567

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Published

2026-01-29

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Updated

2026-02-11

CVSS v3.1

6.5

Medium

VectorAV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions TeamViewer DEX Client (former 1E Client) - Content Distribution Service versions prior to 26.1
Description An integer underflow exists in the UDP command handler of the Content Distribution Service (NomadBranch.exe). This flaw allows a nearby attacker to cause a denial-of-service by sending crafted UDP packets, leading to a heap-based buffer overflow and service crash.
Recommendations Update to version 26.1 or later.

Fix

DoS

Heap Based Buffer Overflow

Integer Overflow

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dbugs@ptsecurity.com

Weakness Enumeration

CWE-122CWE-190

Related Identifiers

BDU:2026-01102
CVE-2026-23567

Affected Products

1E Client
Teamviewer Dex Client