Improper Validation of File Paths in TeamViewer Desktop Clients

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-16444
StatePUBLISHED
AssignerTV
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-26 10:16:39 UTC
Updated2026-09-01 20:50:58 UTC
DescriptionImproper neutralization of path traversal sequences in TeamViewer Desktop Clients prior Version 15.81.5 allows an authenticated remote session participant to write files to unintended locations on the local file system via file transfer or virtual file clipboard mechanisms. An attacker can leverage this behavior to achieve arbitrary file write and potentially execute code with the privileges of the affected user.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.002580000 probability, percentile 0.172220000 (date 2026-09-03)

Problem Types: CWE-73 | CWE-73 CWE-73 External control of file name or path

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNACVSS7.5HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TeamViewer Full Client Host QuickSupport Portable affected 15.0 15.81.5 custom Windows, MacOS, Linux
CNA TeamViewer Full Client Host QuickSupport Portable For Windows 7 8 affected 15.64.0 15.64.7 custom Windows
CNA TeamViewer Full Client Host QuickSupport V14 For Windows affected 14.0 14.7.48833 custom Windows
CNA TeamViewer Full Client Host QuickSupport V14 For Linux affected 14.0 14.7.48838 custom Linux
CNA TeamViewer Full Client Host QuickSupport V14 For MacOS affected 14.0 14.7.48838 custom MacOS
CNA TeamViewer Full Client Host QuickSupport Portable V13 For Windows affected 13.0 13.2.36229 custom Windows
CNA TeamViewer Full Client Host QuickSupport V13 For Linux affected 13.0 13.2.153978 custom Linux
CNA TeamViewer Full Client Host QuickSupport V13 For MacOS affected 13.0 13.2.153981 custom MacOS

References

ReferenceSourceLinkTags
www.teamviewer.com/de/resources/trust-center/security-bulletins/tv-2026-1008 [email protected] www.teamviewer.com
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: Jamir0quai & sam91281 (en)

Additional Advisory Data

Solutions

CNA: Update to the last available client version.

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report