# CVE-2019-5072: Command injection in Tenda AC9

> An attacker can execute arbitrary commands on Tenda AC9 routers by sending a specially crafted HTTP POST request to the WanParameterSetting endpoint.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Nov 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-xrc9-5hxr-j48g

## What is CVE-2019-5072?

CVE-2019-5072 is a high-severity command injection vulnerability in Tenda AC9, published on 21 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An exploitable command injection vulnerability exists in the /goform/WanParameterSetting functionality of Tenda AC9 Router AC1200 Smart Dual-Band Gigabit WiFi Route (AC9V1.0 Firmware V15.03.05.16multiTRU). A specially crafted HTTP POST request can cause a command injection in the DNS2 post parameters, resulting in code execution. An attacker can send HTTP POST request with command to trigger this vulnerability.

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

## Which versions are affected by CVE-2019-5072?

It affects 1 product.


Products: Tendacn Ac9v1.0 Firmware.

## How do I fix CVE-2019-5072?

No fix has been published for CVE-2019-5072 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-5072 being exploited?

There is no known exploitation of CVE-2019-5072 in the wild and no public exploit code.

## Other vulnerabilities in Tenda AC9

- [CVE-2019-5071](https://insights.sbomify.com/CVE-2019-5071/): Command injection in Tenda AC9 (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-5072 and fix it if it is affected.

What it is: CVE-2019-5072 is a high-severity command injection vulnerability in Tenda AC9, published on 21 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-5072 in the wild and no public exploit code.

Affected product: Tenda AC9. 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-2019-5072/ (Markdown: https://insights.sbomify.com/CVE-2019-5072/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5072
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5072
- OSV: https://osv.dev/vulnerability/CVE-2019-5072

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-5072/
Summaries are generated and may contain mistakes; the official description above is the record.