Vulnerability-Lookup

GHSA-GC52-C427-XF67

Vulnerability from github – Published: 2026-09-29 18:31 – Updated: 2026-09-29 18:31

Details

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.

Severity

7.3 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-92369"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-367"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-29T16:17:14Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-gc52-c427-xf67",
  "modified": "2026-09-29T18:31:45Z",
  "published": "2026-09-29T18:31:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92369"
    },
    {
      "type": "WEB",
      "url": "https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1010"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-92369 (GCVE-0-2026-92369)

Vulnerability from cvelistv5 – Published: 2026-09-29 15:39 – Updated: 2026-09-30 15:28

Title

Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer Windows Installer Rollback Mechanism Leads to Local Privilege Escalation

Summary

Severity

7.3 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 15:15 UTC

CWE

CWE-367 - Time-of-check time-of-use (TOCTOU) race condition

Assigner

TV Scorecard

References

1 reference

URL	Tags
https://www.teamviewer.com/en/resources/trust-cen…	vendor-advisory

Impacted products

2 products

Vendor	Product	Version
TeamViewer	Full Client	Affected: 15.0 , < 15.82 (custom) Affected: 15.64.0 (Legacy Windows 7 & 8) , < 15.64.8 (Legacy Windows 7 & 8) (custom) Affected: 14.7.0 , < 14.7.48855 (custom) Affected: 13.2.0 , < 13.2.36230 (custom)
TeamViewer	Host	Affected: 15.0 , < 15.82 (custom) Affected: 15.64.0 (Legacy Windows 7 & 8) , < 15.64.8 (Legacy Windows 7 & 8) (custom) Affected: 14.7.0 , < 14.7.48855 (custom) Affected: 13.2.0 , < 13.2.36230 (custom)

Credits

We thank Romain Igounet and Hugo Leclercq for the discovery and responsible disclosure.

Show details on NVD website

JSON

To clipboard

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                  },
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                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-30T15:15:35.268669Z",
                "version": "2.0.3"
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-GC52-C427-XF67

CVE-2026-92369 (GCVE-0-2026-92369)

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