# CVE-2024-21900: QTS, QuTS hero, QuTScloud

> Authenticated attackers can execute arbitrary commands on QNAP NAS devices via a network injection vulnerability, requiring an OS upgrade to fix.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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:** 8 Mar 2024
- **Updated:** 16 Dec 2025
- **Also known as:** GHSA-hx9j-hf4h-q659

## What is CVE-2024-21900?

CVE-2024-21900 is a medium-severity command injection vulnerability in Qnap Qts, published on 8 Mar 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An injection vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated users to execute commands via a network.

We have already fixed the vulnerability in the following versions:
QTS 5.1.3.2578 build 20231110 and later
QuTS hero h5.1.3.2578 build 20231110 and later
QuTScloud c5.1.5.2651 and later

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2024-21900?

It affects 3 products.


Products: Qnap Qts, Qnap Quts Hero, Qnap Qutscloud.

## How do I fix CVE-2024-21900?

No fix has been published for CVE-2024-21900 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-21900 being exploited?

There is no known exploitation of CVE-2024-21900 in the wild and no public exploit code.

## Other vulnerabilities in Qnap Qts

- [CVE-2020-2509](https://insights.sbomify.com/CVE-2020-2509/): QNAP Network-Attached Storage (NAS) Command Injection (critical 9.8, exploited in the wild)
- [CVE-2018-19949](https://insights.sbomify.com/CVE-2018-19949/): QNAP NAS File Station Command Injection (critical 9.8, exploited in the wild)
- [CVE-2019-7193](https://insights.sbomify.com/CVE-2019-7193/): QNAP QTS Improper Input Validation (critical 9.8, exploited in the wild)
- [CVE-2018-19943](https://insights.sbomify.com/CVE-2018-19943/): QNAP NAS File Station Cross-Site Scripting (high 8.0, exploited in the wild)
- [CVE-2018-19953](https://insights.sbomify.com/CVE-2018-19953/): QNAP NAS File Station Cross-Site Scripting (medium 6.1, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-21900 and fix it if it is affected.

What it is: CVE-2024-21900 is a medium-severity command injection vulnerability in Qnap Qts, published on 8 Mar 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-21900 in the wild and no public exploit code.

Affected product: Qnap Qts. 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-2024-21900/ (Markdown: https://insights.sbomify.com/CVE-2024-21900/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-21900
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-21900
- OSV: https://osv.dev/vulnerability/CVE-2024-21900

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-21900/
Summaries are generated and may contain mistakes; the official description above is the record.