PT-2026-5256 · Teamviewer · Teamviewer Dex Client+1

Published 2026-01-29 · Updated 2026-02-11 · CVE-2026-23569

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/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 versions prior to 26.1

Description An out-of-bounds read issue exists in the TeamViewer DEX Client (formerly 1E Client) - Content Distribution Service (NomadBranch.exe) on Windows. A crafted request can trigger this issue, leading to a denial of service and potential leakage of stack memory. The leaked stack memory could potentially be used to bypass Address Space Layout Randomization (ASLR) and facilitate further exploitation.

Recommendations Update to version 26.1 or later.

Fix

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2026-01105

CVE-2026-23569

Affected Products

1E Client

Teamviewer Dex Client

References · 8

• https://bdu.fstec.ru/vul/2026-01105 · Security Note
• https://teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23569 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23569 · Security Note
• https://twitter.com/VulmonFeeds/status/2016814330310746124 · Twitter Post
• https://t.me/cveNotify/151758 · Telegram Post
• https://twitter.com/CVEnew/status/2016805039587938554 · Twitter Post
• https://t.me/CVEtracker/43225 · Telegram Post