File Hash Validation Bypass in NomadBranch.exe

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-44016
StatePUBLISHED
AssignerTV
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-12-11 12:16:25 UTC
Updated2026-10-08 10:10:00 UTC
DescriptionA vulnerability in TeamViewer DEX Client (former 1E client) - Content Distribution Service (NomadBranch.exe) prior version 25.11 for Windows allows malicious actors to bypass file integrity validation via a crafted request. By providing a valid hash for a malicious file, an attacker can cause the service to incorrectly validate and process the file as trusted, enabling arbitrary code execution under the Nomad Branch service context.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-20 | NVD-CWE-noinfo | CWE-20 CWE-20 Improper Input Validation

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Microsoft Windows - All All All
Application Teamviewer Digital Employee Experience All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TeamViewer DEX affected 25.11.0.29 custom Windows
CNA TeamViewer DEX affected 25.9.0.46 custom Windows
CNA TeamViewer DEX affected 25.5.0.53 custom Windows
CNA TeamViewer DEX affected 24.5.0.69 custom Windows

References

ReferenceSourceLinkTags
www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2025-1005 [email protected] www.teamviewer.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Threat Hunt Team of Bank of America (en)

Additional Advisory Data

Solutions

CNA: Update the TeamViewer DEX client to the latest available version.

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