Vulnerability · Published Aug 26, 2026 · Assigned by TV
CVE-2026-16444Improper Validation of File Paths in TeamViewer Desktop Clients
High 7.5
In plain English
A high-severity security flaw in Full Client, Host, QuickSupport & Portable from TeamViewer. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
Improper 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| TeamViewer | Full Client, Host, QuickSupport & Portable | 15.0 – before 15.81.5 |
| TeamViewer | Full Client, Host, QuickSupport & Portable (for Windows 7 & 8) | 15.64.0 – before 15.64.7 |
| TeamViewer | Full Client, Host, QuickSupport (v14 for Windows) | 14.0 – before 14.7.48833 |
| TeamViewer | Full Client, Host, QuickSupport (v14 for Linux) | 14.0 – before 14.7.48838 |
| TeamViewer | Full Client, Host, QuickSupport (v14 for macOS) | 14.0 – before 14.7.48838 |
| TeamViewer | Full Client, Host, QuickSupport & Portable (v13 for Windows) | 13.0 – before 13.2.36229 |
| TeamViewer | Full Client, Host, QuickSupport (v13 for Linux) | 13.0 – before 13.2.153978 |
| TeamViewer | Full Client, Host, QuickSupport (v13 for macOS) | 13.0 – before 13.2.153981 |
Weakness: CWE-73 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H