Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer Windows Installer Rollback Mechanism Leads to Local Privilege Escalation (CVE-2026-92369) | HOL Guard CVE

High · CVSS 7.3CVE-2026-92369

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

Answer in brief

CVE-2026-92369 records a High severity (CVSS 7.3) vulnerability in Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer Windows Installer Rollback Mechanism Leads to Local Privilege Escalation. The current sources do not mark it as known exploited. The current feed maps TeamViewer/Full Client (generic), TeamViewer/Host (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 29, 2026Updated Sep 29, 2026Source checked Sep 29, 2026First seen by HOL Sep 29, 2026Material review Sep 29, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.3
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps TeamViewer/Full Client (generic), TeamViewer/Host (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
TeamViewer/Full Clientgeneric	>=15.0 <15.82 \|\| >=15.64.0 (Legacy Windows 7 & 8) <15.64.8 (Legacy Windows 7 & 8) \|\| >=14.7.0 <14.7.48855 \|\| >=13.2.0 <13.2.36230	15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855, 13.2.36230, 15.64.8
TeamViewer/Hostgeneric	>=15.0 <15.82 \|\| >=15.64.0 (Legacy Windows 7 & 8) <15.64.8 (Legacy Windows 7 & 8) \|\| >=14.7.0 <14.7.48855 \|\| >=13.2.0 <13.2.36230	15.82, 15.64.8 (Legacy Windows 7 & 8), 14.7.48855, 13.2.36230, 15.64.8

Recommended response

Check inventory. Check lockfiles and deployed manifests for TeamViewer/Full Client, TeamViewer/Host.
Review the reported fix. Source-reported solution: Update to the latest version.

Evidence timeline and material changes

Published upstream
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 29, 2026

Sources and claim methodology

Source referenceteamviewer.com

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.