# CVE-2026-6644: A command injection vulnerability was found in the PPTP VPN Clients on the ADM

> Administrative users can execute arbitrary code on ASUSTOR ADM devices via command injection in PPTP VPN clients, leading to full system compromise.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Apr 2026
- **Updated:** 30 Apr 2026
- **Also known as:** GHSA-32w9-6rwg-p96w

## What is CVE-2026-6644?

CVE-2026-6644 is a critical command injection vulnerability in ASUSTOR Inc. ADM, published on 20 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A command injection vulnerability was found in the PPTP VPN Clients on the ADM. The vulnerability allows an administrative user to break out of the restricted web environment and execute arbitrary code on the underlying operating system. This occurs due to insufficient validation of user-supplied input before it is passed to a system shell. Successful exploitation allows an attacker to achieve Remote Code Execution (RCE) and fully compromise the system.
Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RR42 as well as from ADM 5.0.0 through ADM 5.1.2.REO1.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-6644?

It affects 1 product.


Products: Asustor Data Master.

## How do I fix CVE-2026-6644?

No fix has been published for CVE-2026-6644 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6644 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6644 exists.

Public exploit code:

- https://github.com/uky007/CVE-2026-6644 (github_poc): https://github.com/uky007/CVE-2026-6644

## Other vulnerabilities in ASUSTOR Inc. ADM

- [CVE-2018-12313](https://insights.sbomify.com/CVE-2018-12313/): Command injection in n/a (critical 9.8)
- [CVE-2026-24936](https://insights.sbomify.com/CVE-2026-24936/): An improper input validation vulnerability was found in ADM while joining a AD Domain. (critical 9.5)
- [CVE-2026-3179](https://insights.sbomify.com/CVE-2026-3179/): A path traversal vulnerability was found in the FTP Backup on the ADM. (critical 9.2)
- [CVE-2026-24932](https://insights.sbomify.com/CVE-2026-24932/): An improper certificate validation vulnerability was found in ADM while updating the DDNS settings. (high 8.9)
- [CVE-2026-24933](https://insights.sbomify.com/CVE-2026-24933/): An improper certificate validation vulnerability was found in ADM while sending HTTPS requests to the server. (high 8.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6644 and fix it if it is affected.

What it is: CVE-2026-6644 is a critical command injection vulnerability in ASUSTOR Inc. ADM, published on 20 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-6644 exists.

Affected product: ASUSTOR Inc. ADM. 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-2026-6644/ (Markdown: https://insights.sbomify.com/CVE-2026-6644/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6644
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6644
- OSV: https://osv.dev/vulnerability/CVE-2026-6644

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6644/
Summaries are generated and may contain mistakes; the official description above is the record.