CVE-2026-16444
Improper Validation of File Paths in TeamViewer Desktop Clients
No known exploitation. EPSS puts it in the 16th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.3% chance of exploitation activity in the next 30 days, which ranks it in the 16th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
10 events over 6 days, from the signal feeds we watch.
- Patch availablerecord updated
- OpenVAS check added
- Patch availablerecord updated
- Patch availablepatch available, published, weakness classified, record updated
Affected products
- Full Client, Host, QuickSupport & PortableCommunications / video-conferencing
- Full Client, Host, QuickSupport & Portable (for Windows 7 & 8)Communications / video-conferencing
- Full Client, Host, QuickSupport (v14 for Windows)Communications / video-conferencing
- Full Client, Host, QuickSupport (v14 for Linux)Communications / video-conferencing
- Full Client, Host, QuickSupport (v14 for macOS)Communications / video-conferencing
- Full Client, Host, QuickSupport & Portable (v13 for Windows)Communications / video-conferencing
- Full Client, Host, QuickSupport (v13 for Linux)Communications / video-conferencing
- Full Client, Host, QuickSupport (v13 for macOS)Communications / video-conferencing
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Scored 7.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
Sources
References in the record
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