High severity · published Aug 26, 2026
CVE-2026-16444
Improper Validation of File Paths in TeamViewer Desktop Clients
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FC
Full Client, Host, QuickSupport & Portable · TeamViewer
15.0 before 15.81.5 · source: vendor
FC
Full Client, Host, QuickSupport & Portable (for Windows 7 & 8) · TeamViewer
15.64.0 before 15.64.7 · source: vendor
FC
Full Client, Host, QuickSupport & Portable (v13 for Windows) · TeamViewer
13.0 before 13.2.36229 · source: vendor
FC
Full Client, Host, QuickSupport (v13 for Linux) · TeamViewer
13.0 before 13.2.153978 · source: vendor
FC
Full Client, Host, QuickSupport (v13 for macOS) · TeamViewer
13.0 before 13.2.153981 · source: vendor
FC
Full Client, Host, QuickSupport (v14 for Linux) · TeamViewer
14.0 before 14.7.48838 · source: vendor
FC
Full Client, Host, QuickSupport (v14 for Windows) · TeamViewer
14.0 before 14.7.48833 · source: vendor
FC
Full Client, Host, QuickSupport (v14 for macOS) · TeamViewer
14.0 before 14.7.48838 · source: vendor
Affected product
FC
Full Client, Host, QuickSupport & Portable
TeamViewer
