# CVE-2018-14558: Tenda AC7, AC9, and AC10 Routers Command Injection

> Attackers can execute arbitrary OS commands on Tenda AC7, AC9, and AC10 routers via a crafted request to the USB unload function.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 3 Nov 2021 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Oct 2018
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-jh5j-w2c9-jcff

## What is CVE-2018-14558?

CVE-2018-14558 is a critical command injection vulnerability in Tenda Ac10 Firmware, published on 30 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7), AC9 devices with firmware through V15.03.05.19(6318)_CN(AC9), and AC10 devices with firmware through V15.03.06.23_CN(AC10). A command Injection vulnerability allows attackers to execute arbitrary OS commands via a crafted goform/setUsbUnload request. This occurs because the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input.

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

## Which versions are affected by CVE-2018-14558?

It affects 3 products.


Products: Tenda Ac10 Firmware, Tenda Ac7 Firmware, Tenda Ac9 Firmware.

## How do I fix CVE-2018-14558?

No fix has been published for CVE-2018-14558 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.

## Is CVE-2018-14558 being exploited?

Yes. Attackers have exploited CVE-2018-14558 in the wild since at least 3 Nov 2021.

## Other vulnerabilities in Tenda Ac10 Firmware

- [CVE-2025-67073](https://insights.sbomify.com/CVE-2025-67073/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-45779](https://insights.sbomify.com/CVE-2025-45779/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-25456](https://insights.sbomify.com/CVE-2025-25456/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-25674](https://insights.sbomify.com/CVE-2025-25674/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-25675](https://insights.sbomify.com/CVE-2025-25675/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-14558 and fix it if it is affected.

What it is: CVE-2018-14558 is a critical command injection vulnerability in Tenda Ac10 Firmware, published on 30 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2018-14558 in the wild since at least 3 Nov 2021.

Affected product: Tenda Ac10 Firmware. 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-2018-14558/ (Markdown: https://insights.sbomify.com/CVE-2018-14558/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-14558
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-14558
- OSV: https://osv.dev/vulnerability/CVE-2018-14558

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-14558/
Summaries are generated and may contain mistakes; the official description above is the record.