Command Injection in TeamViewer Desktop Client for Linux through Chat Link Handling (CVE-2026-19042) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-19042

Command Injection in TeamViewer Desktop Client for Linux through Chat Link Handling

Answer in brief

CVE-2026-19042 records a Unknown severity vulnerability in Command Injection in TeamViewer Desktop Client for Linux through Chat Link Handling. 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 Aug 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 <15.81.5 \|\| >=14.0 <14.7.488838 \|\| >=13.0 <13.2.153978	15.81.5, 14.7.488838, 13.2.153978
TeamViewer/Hostgeneric	>=15.0 <15.81.5 \|\| >=14.0 <14.7.488838 \|\| >=13.0 <13.2.153978	15.81.5, 14.7.488838, 13.2.153978

Recommended response

Check inventory. Check lockfiles and deployed manifests for TeamViewer/Full Client, TeamViewer/Host.
Review the reported fix. Update TeamViewer/Full Client to 15.81.5; TeamViewer/Host to 15.81.5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Source referenceteamviewer.com

Upstream source description

A command injection vulnerability in TeamViewer Full Client and Host for Linux prior to version 15.81.5 allows a remote attacker to execute arbitrary commands in the context of the current user via a specially crafted URL sent through the out-of-session chat feature. Exploitation requires user interaction by clicking the malicious link.

Quoted source text, attributed separately from HOL analysis.