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

Vulnerability from cvelistv5 – Published: 2026-09-29 15:39 – Updated: 2026-09-30 15:28
VLAI
Title
Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer Windows Installer Rollback Mechanism Leads to Local Privilege Escalation
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.
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
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
Credits
We thank Romain Igounet and Hugo Leclercq for the discovery and responsible disclosure.
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • 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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.