# CVE-2020-9436: Command injection in n/a

> Authenticated attackers can inject system commands via modified POST requests on PHOENIX CONTACT routers and cloud clients, leading to code execution.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Mar 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-2w9g-759j-gvh6

## What is CVE-2020-9436?

CVE-2020-9436 is a high-severity command injection vulnerability in n/a, published on 12 Mar 2020. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

PHOENIX CONTACT TC ROUTER 3002T-4G through 2.05.3, TC ROUTER 2002T-3G through 2.05.3, TC ROUTER 3002T-4G VZW through 2.05.3, TC ROUTER 3002T-4G ATT through 2.05.3, TC CLOUD CLIENT 1002-4G through 2.03.17, and TC CLOUD CLIENT 1002-TXTX through 1.03.17 devices allow authenticated users to inject system commands through a modified POST request to a specific URL.

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

## Which versions are affected by CVE-2020-9436?

It affects 6 products.


Products: Phoenixcontact Tc Cloud Client 1002-4g Firmware, Phoenixcontact Tc Cloud Client 1002-Txtx Firmware, Phoenixcontact Tc Router 2002t-3g Firmware, Phoenixcontact Tc Router 3002t-4g Att Firmware, Phoenixcontact Tc Router 3002t-4g Firmware, Phoenixcontact Tc Router 3002t-4g Vzw Firmware.

## How do I fix CVE-2020-9436?

No fix has been published for CVE-2020-9436 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-9436 being exploited?

There is no known exploitation of CVE-2020-9436 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-9435](https://insights.sbomify.com/CVE-2020-9435/): Hardcoded credentials in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-9436 and fix it if it is affected.

What it is: CVE-2020-9436 is a high-severity command injection vulnerability in n/a, published on 12 Mar 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-9436 in the wild and no public exploit code.

Affected product: n/a. 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-2020-9436/ (Markdown: https://insights.sbomify.com/CVE-2020-9436/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-9436
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-9436
- OSV: https://osv.dev/vulnerability/CVE-2020-9436

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-9436/
Summaries are generated and may contain mistakes; the official description above is the record.