Is CVE-2026-19743 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-19743 being exploited in the wild.

How severe is CVE-2026-19743?

High severity, with a CVSS score of 7.8, published 29 September 2026.

Which products and versions are affected?

Teamviewer Full Client prior to 15.82; also affects legacy versions 15.64 (Windows), 14.7 (Windows, Linux), 13.2 (Windows, Linux); Teamviewer Host prior to 15.82; also affects legacy versions 15.64 (Windows), 14.7 (Windows, Linux), 13.2 (Windows, Linux).

Is there a fix for CVE-2026-19743?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-19743 attacked?

It is attacked with local access, in a hosted service.

Am I affected by CVE-2026-19743?

Check whether you run Teamviewer Full Client or Teamviewer Host at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-19743: TeamViewer Full Client and Host path traversal in IPC service

CVE-2026-19743 · Severity: high · CVSS 7.8 · Published 2026-09-29

TeamViewer's local inter-process communication (IPC) service on Windows, Linux, and macOS fails to properly validate file paths, allowing a logged-in user with basic privileges to write files with system-level permissions. An attacker could exploit this to gain complete control of a computer by executing code as the system administrator.

Technologies: Teamviewer Full Client, Teamviewer Host. Vendors: Teamviewer.

Quick answers

Is CVE-2026-19743 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-19743 being exploited in the wild.
How severe is CVE-2026-19743?: High severity, with a CVSS score of 7.8, published 29 September 2026.
Which products and versions are affected?: Teamviewer Full Client prior to 15.82; also affects legacy versions 15.64 (Windows), 14.7 (Windows, Linux), 13.2 (Windows, Linux); Teamviewer Host prior to 15.82; also affects legacy versions 15.64 (Windows), 14.7 (Windows, Linux), 13.2 (Windows, Linux).
Is there a fix for CVE-2026-19743?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-19743 attacked?: It is attacked with local access, in a hosted service.
Am I affected by CVE-2026-19743?: Check whether you run Teamviewer Full Client or Teamviewer Host at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A local authenticated user can send crafted IPC commands to manipulate file paths and perform arbitrary file writes with SYSTEM/root privileges. The vulnerability stems from improper path validation (CWE-22) in the IPC service daemon, allowing privilege escalation from a low-privileged local user to NT AUTHORITY/SYSTEM or root. This requires local network access and an authenticated user account.

Affected products

TeamViewer Full Client prior to 15.82; also affects legacy versions 15.64 (Windows), 14.7 (Windows, Linux), 13.2 (Windows, Linux)
TeamViewer Host prior to 15.82; also affects legacy versions 15.64 (Windows), 14.7 (Windows, Linux), 13.2 (Windows, Linux)

Timeline

2026-09-29: disclosed

References

https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1010/

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