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TI-2026-81366 Aliases CVE-2026-111583GHSA-hrqq-g8xw-f4cw

Local privilege escalation in TeamViewer Client for Windows installer

Priority LOW 33CWE-269Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-269.

Summary

TeamViewer Full Client and Host for Windows before 15.82, and versions from 15.64.0 before 15.64.10 for legacy Windows 7 and 8, contain an improper access control flaw (CWE-269) in the installer staging directory used during Advanced Asset Management installation. A local authenticated user with low privileges can place a crafted installer options file that the installer processes during service activation, allowing arbitrary commands as SYSTEM.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

Improper access control in the installer staging directory used by TeamViewer Full Client and Host prior to version 15.82 for Windows during installation of Advanced Asset Management allows a local authenticated user with low privileges to execute arbitrary commands as SYSTEM. An attacker can place a crafted installer options file that is processed by the Advanced Asset Management installer during service activation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00193 8th percentileScored 2026-11-07
Fix Fixed Full Client (TeamViewer): 15.82, 15.64.10 (Legacy windows 7 & 8)Host (TeamViewer): 15.82, 15.64.10 (Legacy Windows 7 & 8)

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 Clientbefore 15.82; 15.64.0 (Legacy windows 7 & 8) to before 15.64.10 (Legacy windows 7 & 8)15.82, 15.64.10 (Legacy windows 7 & 8)Patch availableCNA
TeamViewerHostbefore 15.82; 15.64.0 (Legacy Windows 7 & 8) to before 15.64.10 (Legacy Windows 7 & 8)15.82, 15.64.10 (Legacy Windows 7 & 8)Patch availableCNA
  • Full Client VendorTeamViewer Affected before 15.82; 15.64.0 (Legacy windows 7 & 8) to before 15.64.10 (Legacy windows 7 & 8) Fixed in 15.82, 15.64.10 (Legacy windows 7 & 8) Patch available CNA
  • Host VendorTeamViewer Affected before 15.82; 15.64.0 (Legacy Windows 7 & 8) to before 15.64.10 (Legacy Windows 7 & 8) Fixed in 15.82, 15.64.10 (Legacy Windows 7 & 8) Patch available CNA

Remediation

Upgrade TeamViewer Full Client and Host to version 15.82, or to 15.64.10 on legacy Windows 7 and 8.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA Full Client (TeamViewer) Fixed in 15.82, 15.64.10 (Legacy windows 7 & 8)
  • Fix · CNA Host (TeamViewer) Fixed in 15.82, 15.64.10 (Legacy Windows 7 & 8)

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…

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-81363 TeamViewer Patch Management flaw allows local privilege escalationPriority LOW 35
    • TI-2026-81361 Local privilege escalation in TeamViewer Remote Management MonitoringPriority LOW 35
    Show all 3 records → Advisory →

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-111583
  2. 2026-10-27 Alias added: GHSA-hrqq-g8xw-f4cw
  3. 2026-10-28 Priority changed: MEDIUM → LOW
  4. 2026-11-04 CISA SSVC decision points changed

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