CVE-2026-92369
Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer Windows Installer Rollback Mechanism Leads to Local Privilege Escalation
No known exploitation. EPSS puts it in the 0th percentile. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- TeamViewer Full ClientAffected: ≥ 15.0, < 15.82Upgrade to: 15.82Affected: ≥ 15.64.0 (Legacy Windows 7 & 8), < 15.64.8 (Legacy Windows 7 & 8)Upgrade to: 15.64.8 (Legacy Windows 7 & 8)Affected: ≥ 14.7.0, < 14.7.48855Upgrade to: 14.7.48855Affected: ≥ 13.2.0, < 13.2.36230Upgrade to: 13.2.36230Stated by: CVE record
- TeamViewer HostAffected: ≥ 15.0, < 15.82Upgrade to: 15.82Affected: ≥ 15.64.0 (Legacy Windows 7 & 8), < 15.64.8 (Legacy Windows 7 & 8)Upgrade to: 15.64.8 (Legacy Windows 7 & 8)Affected: ≥ 14.7.0, < 14.7.48855Upgrade to: 14.7.48855Affected: ≥ 13.2.0, < 13.2.36230Upgrade to: 13.2.36230Stated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
<0.1% chance of exploitation activity in the next 30 days, which ranks it in the 0th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
10 events over 1 day, from the signal feeds we watch.
- Patch availablerecord updated
- Patch availablepatch available, patch available, published, weakness classified, att&ck mapped, record updated, record updated
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Scored 7.3 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required LowRequires basic user-level privileges
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Privilege EscalationT1068Exploitation for Privilege Escalationmedium confidence
Sources
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