# Improper Validation of File Paths in TeamViewer Desktop Clients

CVE record · `CVE-2026-16444`

- **Identifiers:** `CVE-2026-16444`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **CNA:** TV
- **Weakness (CWE):** [CWE-73](https://cwe.mitre.org/data/definitions/73.html)
- **Tags:** [Path traversal](https://agentprime.io/advisories/tag/path-traversal.md)
- **Technologies:** [TeamViewer Full Client, Host, QuickSupport & Portable](https://agentprime.io/advisories/technology/teamviewer-full-client-host-quicksupport-portable.md) · [TeamViewer Full Client, Host, QuickSupport & Portable (for Windows 7 & 8)](https://agentprime.io/advisories/technology/teamviewer-full-client-host-quicksupport-portable-for-windows-7-8.md) · [TeamViewer Full Client, Host, QuickSupport (v14 for Windows)](https://agentprime.io/advisories/technology/teamviewer-full-client-host-quicksupport-v14-for-windows.md) · [TeamViewer Full Client, Host, QuickSupport (v14 for Linux)](https://agentprime.io/advisories/technology/teamviewer-full-client-host-quicksupport-v14-for-linux.md) · [TeamViewer Full Client, Host, QuickSupport (v14 for macOS)](https://agentprime.io/advisories/technology/teamviewer-full-client-host-quicksupport-v14-for-macos.md) · [TeamViewer Full Client, Host, QuickSupport & Portable (v13 for Windows)](https://agentprime.io/advisories/technology/teamviewer-full-client-host-quicksupport-portable-v13-for-windows.md) · [TeamViewer Full Client, Host, QuickSupport (v13 for Linux)](https://agentprime.io/advisories/technology/teamviewer-full-client-host-quicksupport-v13-for-linux.md) · [TeamViewer Full Client, Host, QuickSupport (v13 for macOS)](https://agentprime.io/advisories/technology/teamviewer-full-client-host-quicksupport-v13-for-macos.md)
- **Published:** 26 Aug 2026
- **Updated:** 27 Aug 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: TV) at 26 Aug 2026, 09:10 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: TeamViewer. Product: Full Client, Host, QuickSupport & Portable.
  - affected: `15.0 to before 15.81.5` (custom)
  - Other versions: unaffected
- Vendor: TeamViewer. Product: Full Client, Host, QuickSupport & Portable (for Windows 7 & 8).
  - affected: `15.64.0 to before 15.64.7` (custom)
  - Other versions: unaffected
- Vendor: TeamViewer. Product: Full Client, Host, QuickSupport (v14 for Windows).
  - affected: `14.0 to before 14.7.48833` (custom)
  - Other versions: unaffected
- Vendor: TeamViewer. Product: Full Client, Host, QuickSupport (v14 for Linux).
  - affected: `14.0 to before 14.7.48838` (custom)
  - Other versions: unaffected
- Vendor: TeamViewer. Product: Full Client, Host, QuickSupport (v14 for macOS).
  - affected: `14.0 to before 14.7.48838` (custom)
  - Other versions: unaffected
- Vendor: TeamViewer. Product: Full Client, Host, QuickSupport & Portable (v13 for Windows).
  - affected: `13.0 to before 13.2.36229` (custom)
  - Other versions: unaffected
- Vendor: TeamViewer. Product: Full Client, Host, QuickSupport (v13 for Linux).
  - affected: `13.0 to before 13.2.153978` (custom)
  - Other versions: unaffected
- Vendor: TeamViewer. Product: Full Client, Host, QuickSupport (v13 for macOS).
  - affected: `13.0 to before 13.2.153981` (custom)
  - Other versions: unaffected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`, from CNA (TV)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0041, the 35th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 26 Aug 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-16444](https://www.cve.org/CVERecord?id=CVE-2026-16444)
- [NVD: CVE-2026-16444](https://nvd.nist.gov/vuln/detail/CVE-2026-16444)

### References from the CNA

- <https://www.teamviewer.com/de/resources/trust-center/security-bulletins/tv-2026-1008/>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-16444>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-16444/>. Everything for agents: <https://agentprime.io/llms.txt>.