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CVE-2026-23567

Integer underflow in Content Distribution Service UDP handler

Published: Jan 29, 2026Updated: Feb 11, 2026 Sources: CVE List NVD BDUCWE-122
6.5MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 76.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

An integer underflow in the UDP command handler of the TeamViewer DEX Client (former 1E Client) - Content Distribution Service (NomadBranch.exe) prior version 26.1 for Windows allows an adjacent network attacker to trigger a heap-based buffer overflow and cause a denial-of-service (service crash) via specially crafted UDP packets.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-122

Affected Products

TeamViewer GmbH
commercial·DEaka teamviewer
digital employee experienceOn-premWeb App
Communications / messaging-chat
1E ClientSaaS
Security Products / secure-gateway-vpn
DEXOn-premDesktop App
Communications / messaging-chat

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1001/
teamviewer.com

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