# CVE-2017-7876: Command injection in n/a

> Attackers can execute arbitrary commands on QNAP QTS devices due to a command injection vulnerability, requiring an upgrade to patched firmware versions.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jun 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-5xf4-p9fw-x9pj

## What is CVE-2017-7876?

CVE-2017-7876 is a critical command injection vulnerability in Qnap Qts, published on 15 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

This command injection vulnerability in QTS allows attackers to run arbitrary commands in the compromised application. QNAP have already fixed the issue in QTS 4.2.6 build 20170517, QTS 4.3.3.0174 build 20170503 and later versions.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2017-7876?

It affects 1 product.


Products: Qnap Qts.

## How do I fix CVE-2017-7876?

No fix has been published for CVE-2017-7876 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-7876 being exploited?

There is no known exploitation of CVE-2017-7876 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-2017-7876 and fix it if it is affected.

What it is: CVE-2017-7876 is a critical command injection vulnerability in Qnap Qts, published on 15 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-7876 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-2017-7876/ (Markdown: https://insights.sbomify.com/CVE-2017-7876/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-7876
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-7876
- OSV: https://osv.dev/vulnerability/CVE-2017-7876

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-7876/
Summaries are generated and may contain mistakes; the official description above is the record.