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CVE-2026-19743

Improper Limitation of a Pathname to a Restricted Directory (Path Traversal) in TeamViewer Desktop Clients

No known exploitation. EPSS puts it in the 2nd percentile. Fixed versions are out.

CVSS 3.17.8HighEPSS percentile2nd0.1% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix2 products4 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • TeamViewer Full ClientAffected: ≥ 15.0, < 15.82Upgrade to: 15.82Affected: ≥ 15.64.0 (Legacy Windows 7 & 8), < 15.64.8 (Legacy Windows 7 & 8)Upgrade to: 15.64.8 (Legacy Windows 7 & 8)Affected: ≥ 14.7.0 (Windows), < 14.7.48855 (Windows)Upgrade to: 14.7.48855 (Windows)Affected: ≥ 13.2.0 (Windows), < 13.2.36230 (Windows)Upgrade to: 13.2.36230 (Windows) + 4 more branchesStated by: CVE record
  • TeamViewer HostAffected: ≥ 15.0, < 15.82Upgrade to: 15.82Affected: ≥ 15.64.0 (Legacy Windows 7 & 8), < 15.64.8 (Legacy Windows 7 & 8)Upgrade to: 15.64.8 (Legacy Windows 7 & 8)Affected: ≥ 14.7.0 (Windows), < 14.7.48855 (Windows)Upgrade to: 14.7.48855 (Windows)Affected: ≥ 13.2.0 (Windows), < 13.2.36230 (Windows)Upgrade to: 13.2.36230 (Windows) + 4 more branchesStated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

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What it is

From the CVE record

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.

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.

EPSS2nd
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

0.1% chance of exploitation activity in the next 30 days, which ranks it in the 2nd percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

10 events over 1 day, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. Patch availablepatch available, patch available, published, weakness classified, att&ck mapped, record updated, record updated

Affected products

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Scored 7.8 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

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

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

In the news

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