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Windows CVE-2026-23570

MEDIUM
Improper Input Validation (CWE-20)
2026-01-29 psirt@teamviewer.com
6.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.5 MEDIUM
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:00 vuln.today
CVE Published
Jan 29, 2026 - 09:16 nvd
MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

Log timestamp tampering in TeamViewer DEX Client versions prior to 26.1 allows adjacent network attackers to inject malicious UDP Sync commands that corrupt event timestamps, undermining log integrity and forensic investigation capabilities. This input validation flaw affects Windows deployments of the NomadBranch service and could enable attackers to obscure the timeline of malicious activities or create misleading audit trails. No patch is currently available for this medium-severity vulnerability.

Technical ContextAI

Classified as CWE-20 (Improper Input Validation). Affects Digital Employee Experience. 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.

RemediationAI

Monitor vendor advisories for a patch.

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CVE-2026-23570 vulnerability details – vuln.today

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