What is CVE-2026-19743?

CVE-2026-19743 is a high-severity vulnerability in Teamviewer Full Client, classified under Path Traversal. CVSS score: 7.8/10. Published 2026-09-29.

How severe is CVE-2026-19743?

High severity. CVSS v3 base score is 7.8 out of 10.

Path Traversal in Teamviewer Full Client

CVE-2026-19743

Improper path validation in the local IPC service of TeamViewer Full Client and Host on Windows, Linux, and macOS prior to version 15.82 allows a local authenticated user with low privileges to perform arbitrary file writes with elevated privileges (NT AUTHORITY/SYSTEM \ root). By sending crafted IPC commands to the local service daemon, an attacker could manipulate file paths, leading to local privilege escalation.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2026-09-29 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-22 — Path Traversal

References

www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1010/ (vendor-advisory)

Frequently asked questions

What is CVE-2026-19743?: CVE-2026-19743 is a high-severity vulnerability in Teamviewer Full Client, classified under Path Traversal. CVSS score: 7.8/10. Published 2026-09-29.
How severe is CVE-2026-19743?: High severity. CVSS v3 base score is 7.8 out of 10.