# CVE-2026-8381: TeamViewer DEX Platform broken access control in backend API

Source: https://junglewise.ai/threats/cve-2026-8381-teamviewer-dex-platform-broken-access-control-in-backend-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-22. Updated: 2026-05-22  
License: CC BY 4.0 with a link back

CVE-2026-8381 · Severity: medium · CVSS 5.4 · Published 2026-05-22

A security flaw in the TeamViewer DEX Platform (On-Premises) allows users with standard access to perform administrative tasks or view sensitive information they should not be able to see. This occurs because certain backend systems do not properly verify a user's permission level before processing requests. An attacker with basic login credentials could exploit this to gain unauthorized control over administrative functions or access restricted data.

Vendors: [Teamviewer](https://junglewise.ai/threats/vendors/teamviewer).

## Quick answers

**Is CVE-2026-8381 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-8381 being exploited in the wild.

**How severe is CVE-2026-8381?** Medium severity, with a CVSS score of 5.4, published 22 May 2026.

**Which products and versions are affected?** Teamviewer DEX Platform On-Premises < 9.2.

**Is there a fix for CVE-2026-8381?** A patch was published on 2026-05-22: Fix released in version 9.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-8381 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-8381?** Check whether you run Teamviewer DEX Platform On-Premises at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A broken access control vulnerability (CWE-862) exists in the TeamViewer DEX Platform (On-Premises) prior to version 9.2. The root cause is a failure in certain backend API endpoints to correctly enforce server-side authorization checks. An attacker with valid, low-privileged credentials can send crafted requests to these endpoints to perform actions or access resources intended only for higher-privileged roles. The vulnerability is reachable over the network and does not require user interaction. TeamViewer has addressed this issue in version 9.2.

## Affected products

- TeamViewer DEX Platform (On-Premises) < 9.2

## Timeline

- 2026-05-22: advisory: TeamViewer security bulletin TV-2026-1005 published
- 2026-05-22: disclosed: CVE-2026-8381 published to NVD
- 2026-05-22: patched: Fix released in version 9.2

## References

- [https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1005/](https://www.teamviewer.com/en/resources/trust-center/security-bulletins/tv-2026-1005/)

## Related threats

- [TeamViewer DEX Platform command injection in instruction input](https://junglewise.ai/threats/cve-2026-2695-teamviewer-dex-platform-command-injection-in-instruction-input)