Time-of-check Time-of-use (TOCTOU) Race Condition in TeamViewer Windows Installer Rollback Mechanism Leads to Local Privilege Escalation
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.
CVE-2026-92369
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-92369
Full Client
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Host
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "TeamViewer",
"product": "Full Client",
"versions": [
{
"status": "affected",
"version": "15.0",
"lessThan": "15.82",
"versionType": "custom"
},
{
"status": "affected",
"version": "15.64.0 (Legacy Windows 7 & 8)",
"lessThan": "15.64.8 (Legacy Windows 7 & 8)",
"versionType": "custom"
},
{
"status": "affected",
"version": "14.7.0",
"lessThan": "14.7.48855",
"versionType": "custom"
},
{
"status": "affected",
"version": "13.2.0",
"lessThan": "13.2.36230",
"versionType": "custom"
}
],
"platforms": [
"Windows"
],
"defaultStatus": "unaffected"
},
{
"vendor": "TeamViewer",
"product": "Host",
"versions": [
{
"status": "affected",
"version": "15.0",
"lessThan": "15.82",
"versionType": "custom"
},
{
"status": "affected",
"version": "15.64.0 (Legacy Windows 7 & 8)",
"lessThan": "15.64.8 (Legacy Windows 7 & 8)",
"versionType": "custom"
},
{
"status": "affected",
"version": "14.7.0",
"lessThan": "14.7.48855",
"versionType": "custom"
},
{
"status": "affected",
"version": "13.2.0",
"lessThan": "13.2.36230",
"versionType": "custom"
}
],
"platforms": [
"Windows"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-92369
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #4544 · Revision 1
- Added to Heist Feed
- Publisher date