# CVE-2026-8381: Broken Access Control in TeamViewer DEX Platform (On Premises)

> Low-privileged users can access administrative functions due to missing authorization checks in TeamViewer DEX Platform backend APIs.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 May 2026
- **Updated:** 22 May 2026
- **Also known as:** GHSA-x4qq-w73c-72mv

## What is CVE-2026-8381?

CVE-2026-8381 is a medium-severity missing authorization vulnerability in TeamViewer DEX (On-premises), published on 22 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A broken access
control vulnerability exists in the TeamViewer DEX Platform (On‑Premises) prior version 9.2. Certain backend API endpoints do not
correctly enforce authorization checks, allowing an authenticated user with low
privileges to perform actions and access resources intended only for higher‑privileged roles. An attacker with
low‑privileged credentials may exploit
this to gain unauthorized access to administrative or sensitive functionality.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-8381?


## How do I fix CVE-2026-8381?

No fix has been published for CVE-2026-8381 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8381 being exploited?

There is no known exploitation of CVE-2026-8381 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8381 and fix it if it is affected.

What it is: CVE-2026-8381 is a medium-severity missing authorization vulnerability in TeamViewer DEX (On-premises), published on 22 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-8381 in the wild and no public exploit code.

Affected product: TeamViewer DEX (On-premises). No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-8381/ (Markdown: https://insights.sbomify.com/CVE-2026-8381/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8381
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8381
- OSV: https://osv.dev/vulnerability/CVE-2026-8381

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-8381/
Summaries are generated and may contain mistakes; the official description above is the record.