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
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
FC
FC