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TI-2026-62304 Aliases CVE-2026-92369GHSA-gc52-c427-xf67

Time-of-check time-of-use race condition in TeamViewer Full Client

Priority LOW 33CWE-367Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
Required
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

TeamViewer Full Client and Host prior to version 15.82 on Windows contain a TOCTOU race condition in the installer rollback mechanism. A local low-privileged attacker can replace rollback backup files stored in a user-writable temporary directory before they are restored by an elevated installer, resulting in privilege escalation to NT AUHORITY/SYSTEM. Exploitation requires successful timing of the race condition and a rollback during installation or update.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00095 0th percentileScored 2026-11-07
Fix Fixed Full Client (TeamViewer): 15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855 +1Host (TeamViewer): 15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855 +1

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 to before 14.7.48855; 13.2.0 to before 13.2.3623015.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855, 13.2.36230Patch 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 to before 14.7.48855; 13.2.0 to before 13.2.3623015.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855, 13.2.36230Patch 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 to before 14.7.48855; 13.2.0 to before 13.2.36230 Fixed in 15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855, 13.2.36230 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 to before 14.7.48855; 13.2.0 to before 13.2.36230 Fixed in 15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855, 13.2.36230 Patch available CNA

Remediation

  • Fix · CNA Full Client (TeamViewer) Fixed in 15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855, 13.2.36230
  • Fix · CNA Host (TeamViewer) Fixed in 15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855, 13.2.36230

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-2026-16009 Improper Limitation of a Pathname to a Restricted Directory (Path Traversal) in TeamViewer Desktop ClientsPriority LOW 35
    Show all 5 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-92369
  2. 2026-10-03 Alias added: GHSA-gc52-c427-xf67

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