CyberSecBulletin
CVE-2026-92370NVD status: Deferred

Full Client: Improper Access Control

Published Updated By the CyberSecBulletin desk

CVE-2026-92370 is a high-severity improper access control vulnerability in Full Client from TeamViewer, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. The record lists versions 15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855 (Windows) as the first without the flaw, so updating Full Client to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.42% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Full Client to 15.82 or 15.64.8 (Legacy Windows 7 & 8) or 14.7.48855 (Windows) or 13.2.36230 (Windows), whichever matches your release line, or a later version.
  2. Update Host to 15.82 or 15.64.8 (Legacy Windows 7 & 8) or 14.7.48855 (Windows) or 13.2.36230 (Windows), whichever matches your release line, or a later version.
  3. Read the advisory on teamviewer.com for workarounds and exact fixed builds.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
  5. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
TeamViewerFull Client15.0 up to, but not including, 15.82; 15.64.0 (Legacy Windows 7 & 8) up to, but not including, 15.64.8 (Legacy Windows 7 & 8); 14.7.0 (Windows) up to, but not including, 14.7.48855 (Windows); 13.2.0 (Windows) up to, but not including, 13.2.36230 (Windows); 14.7.0 (Linux) up to, but not including, 14.7.48855 (Linux); 13.2.0 (Linux) up to, but not including, 13.2.153995 (Linux); 14.7.0 (MacOS) up to, but not including, 14.7.48855 (MacOS); 13.2.0 (MacOS) up to, but not including, 13.2.153994 (MacOS)15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855 (Windows), 13.2.36230 (Windows), 14.7.48855 (Linux), 13.2.153995 (Linux)
TeamViewerHost15.0 up to, but not including, 15.82; 15.64.0 (Legacy Windows 7 & 8) up to, but not including, 15.64.8 (Legacy Windows 7 & 8); 14.7.0 (Windows) up to, but not including, 14.7.48855 (Windows); 13.2.0 (Windows) up to, but not including, 13.2.36230 (Windows); 14.7.0 (Linux) up to, but not including, 14.7.48855 (Linux); 13.2.0 (Linux) up to, but not including, 13.2.153995 (Linux); 14.7.0 (MacOS) up to, but not including, 14.7.48855 (MacOS); 13.2.0 (MacOS) up to, but not including, 13.2.153994 (MacOS)15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855 (Windows), 13.2.36230 (Windows), 14.7.48855 (Linux), 13.2.153995 (Linux)

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
RequiredA user must take an action such as opening a file or link.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. Scored by CNA (teamviewer.com).

Official description

An improper access control vulnerability in TeamViewer Full Client, Host, and related affected modules on Windows, Linux, and macOS allows an authenticated remote attacker to bypass user-configured permission settings during session establishment. By modifying access control parameters for restricted features, an attacker can perform actions that were explicitly denied by the victim's configuration. This may result in unauthorized actions and potentially lead to remote code execution on the target system.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Access Control

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

How developers prevent this class of flaw

  • Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
  • Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

More Improper Access Control vulnerabilities (CWE-284)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Full Client

All Full Client vulnerabilities

Recent Improper Access Control vulnerabilities

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