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TI-2026-16009 Aliases CVE-2026-19743GHSA-xx8p-86ff-fc5j

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

Priority LOW 35CWE-22Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00146 3rd percentileScored 2026-11-07
Fix Fixed Full Client (TeamViewer): 15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855 (Windows) +5Host (TeamViewer): 15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855 (Windows) +5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TeamViewerFull Client15.0 to before 15.82; 15.64.0 (Legacy Windows 7 & 8) to before 15.64.8 (Legacy Windows 7 & 8); 14.7.0 (Windows) to before 14.7.48855 (Windows); 13.2.0 (Windows) to before 13.2.36230 (Windows); 14.7.0 (Linux) to before 14.7.48855 (Linux); 13.2.0 (Linux) to before 13.2.153995 (Linux); 14.7.0 (MacOS) to before 14.7.48855 (MacOS); 13.2.0 (MacOS) to before 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), 14.7.48855 (MacOS), 13.2.153994 (MacOS)Patch availableCNA
TeamViewerHost15.0 to before 15.82; 15.64.0 (Legacy Windows 7 & 8) to before 15.64.8 (Legacy Windows 7 & 8); 14.7.0 (Windows) to before 14.7.48855 (Windows); 13.2.0 (Windows) to before 13.2.36230 (Windows); 14.7.0 (Linux) to before 14.7.48855 (Linux); 13.2.0 (Linux) to before 13.2.153995 (Linux); 14.7.0 (MacOS) to before 14.7.48855 (MacOS); 13.2.0 (MacOS) to before 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), 14.7.48855 (MacOS), 13.2.153994 (MacOS)Patch availableCNA
  • Full Client VendorTeamViewer Affected 15.0 to before 15.82; 15.64.0 (Legacy Windows 7 & 8) to before 15.64.8 (Legacy Windows 7 & 8); 14.7.0 (Windows) to before 14.7.48855 (Windows); 13.2.0 (Windows) to before 13.2.36230 (Windows); 14.7.0 (Linux) to before 14.7.48855 (Linux); 13.2.0 (Linux) to before 13.2.153995 (Linux); 14.7.0 (MacOS) to before 14.7.48855 (MacOS); 13.2.0 (MacOS) to before 13.2.153994 (MacOS) Fixed in 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), 14.7.48855 (MacOS), 13.2.153994 (MacOS) Patch available CNA
  • Host VendorTeamViewer Affected 15.0 to before 15.82; 15.64.0 (Legacy Windows 7 & 8) to before 15.64.8 (Legacy Windows 7 & 8); 14.7.0 (Windows) to before 14.7.48855 (Windows); 13.2.0 (Windows) to before 13.2.36230 (Windows); 14.7.0 (Linux) to before 14.7.48855 (Linux); 13.2.0 (Linux) to before 13.2.153995 (Linux); 14.7.0 (MacOS) to before 14.7.48855 (MacOS); 13.2.0 (MacOS) to before 13.2.153994 (MacOS) Fixed in 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), 14.7.48855 (MacOS), 13.2.153994 (MacOS) Patch available CNA

Remediation

  • Fix · CNA Full Client (TeamViewer) Fixed in 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), 14.7.48855 (MacOS), 13.2.153994 (MacOS)
  • Fix · CNA Host (TeamViewer) Fixed in 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), 14.7.48855 (MacOS), 13.2.153994 (MacOS)

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    TeamViewer Full Client, Host — teamviewer.com/en/resources/trust-center/security-bulletins…

    5 records Highest priority Priority MEDIUM 1 MEDIUM, 4 LOW

    Other records, highest priority first

    • TI-2026-62305 Remote Session Access Control Bypass Leading to Remote Code ExecutionPriority MEDIUM 40
    • TI-2026-62303 Heap-Based Buffer Overflow in TeamViewer Session Recording Playback Leads to Remote Code ExecutionPriority LOW 35
    • TI-2026-62304 Time-of-check time-of-use race condition in TeamViewer Full ClientPriority LOW 33
    Show all 5 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-19743
  2. 2026-10-03 Alias added: GHSA-xx8p-86ff-fc5j

References

Advisory 1

  • TI-2019-13681 TeamViewer Desktop through 14.7.1965 allows a bypass of remote-login access control… KEVCVSS 3.1HIGH 7.0
  • TI-2020-10745 TeamViewer Desktop for Windows before 15.8.3 does not properly quote its custom URI… CVSS 3.1HIGH 8.8
  • TI-2010-02989 Untrusted search path vulnerability in TeamViewer 5.0.8703 and earlier allows local… CVSS 2.0HIGH 9.3
  • TI-2021-13849 Memory corruption in TeamViewer CVSS 3.1HIGH 8.8
  • TI-2018-11870 TeamViewer 10.x through 13.x allows remote attackers to bypass the brute-force… CVSS 3.0CRITICAL 9.8
  • TI-2025-28565 File Hash Validation Bypass in NomadBranch.exe CVSS 3.1HIGH 8.8
See all 67 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences