Command Injection in TeamViewer Desktop Client for Linux through Chat Link Handling
Priority MEDIUM 44CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01763 78th percentileScored 2026-11-07
Fix Fixed Full Client (TeamViewer): 15.81.5, 14.7.488838, 13.2.153978Host (TeamViewer): 15.81.5, 14.7.488838, 13.2.153978
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| TeamViewer | Full Client | 15.0 to before 15.81.5; 14.0 to before 14.7.488838; 13.0 to before 13.2.153978 | 15.81.5, 14.7.488838, 13.2.153978 | Patch available | CNA |
| TeamViewer | Host | 15.0 to before 15.81.5; 14.0 to before 14.7.488838; 13.0 to before 13.2.153978 | 15.81.5, 14.7.488838, 13.2.153978 | Patch available | CNA |
- Full Client VendorTeamViewer Affected 15.0 to before 15.81.5; 14.0 to before 14.7.488838; 13.0 to before 13.2.153978 Fixed in 15.81.5, 14.7.488838, 13.2.153978 Patch available CNA
- Host VendorTeamViewer Affected 15.0 to before 15.81.5; 14.0 to before 14.7.488838; 13.0 to before 13.2.153978 Fixed in 15.81.5, 14.7.488838, 13.2.153978 Patch available CNA
Remediation
- Fix · CNA Full Client (TeamViewer) Fixed in 15.81.5, 14.7.488838, 13.2.153978
- Fix · CNA Host (TeamViewer) Fixed in 15.81.5, 14.7.488838, 13.2.153978
Timeline
- 2026-10-02 Threatist record created from CVE-2026-19042
- 2026-10-03 Alias added: GHSA-hv9x-3jwv-hvm4
References
More TeamViewer vulnerabilities
- TI-2019-13681 TeamViewer Desktop through 14.7.1965 allows a bypass of remote-login access control… KEVCVSS 3.1HIGH 7.0
- TI-2020-10745 TeamViewer Desktop for Windows before 15.8.3 does not properly quote its custom URI… CVSS 3.1HIGH 8.8
- TI-2010-02989 Untrusted search path vulnerability in TeamViewer 5.0.8703 and earlier allows local… CVSS 2.0HIGH 9.3
- TI-2021-13849 Memory corruption in TeamViewer CVSS 3.1HIGH 8.8
- TI-2018-11870 TeamViewer 10.x through 13.x allows remote attackers to bypass the brute-force… CVSS 3.0CRITICAL 9.8
- TI-2025-28565 File Hash Validation Bypass in NomadBranch.exe CVSS 3.1HIGH 8.8
Sources
- CVE-2026-19042 · CVE Program
- CVE-2026-19042 · NVD
- FIRST EPSS
- GHSA-hv9x-3jwv-hvm4 · GitHub Advisory Database · CC BY 4.0
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