# CVE-2026-19743 — TeamViewer Full Client

> As of 2026-09-30, CVE-2026-19743 is a HIGH-severity vulnerability in TeamViewer Full Client, CVSS v3.1 7.8, EPSS 0.1% (2.2th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-19743, most recently “Multiple High-Severity Vulnerabilities in TeamViewer Client (CVE-2026-92370, CVE-2026-92368, CVE-2026-92369, CVE-2026-92371, CVE-2026-19743)”.

**Last updated:** 2026-09-30

## What is 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.

The record classifies CVE-2026-19743 under weakness class [CWE-22](https://intel.threadlinqs.com/cwe/CWE-22). Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 30 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 7.8 — HIGH (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 2.2% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-29, last modified 2026-09-30

## Is CVE-2026-19743 being exploited?

It currently carries a trending score of 33 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [TeamViewer](https://intel.threadlinqs.com/vendors/teamviewer): Full Client, Host

## How to fix CVE-2026-19743

No vendor patch reference has been recorded for CVE-2026-19743 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-19743

1 tracked threat in the Threadlinqs corpus references CVE-2026-19743, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Multiple High-Severity Vulnerabilities in TeamViewer Client (CVE-2026-92370, CVE-2026-92368, CVE-2026-92369, CVE-2026-92371, CVE-2026-19743)](https://intel.threadlinqs.com/threat/TL-2026-2905) — HIGH · 2026-10-02

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-10-10.

**Vendor advisory and patch**

- [teamviewer.com — vendor advisory](https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1010/)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-19743
Full detection coverage and IOCs for threats exploiting CVE-2026-19743 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp