# CVE-2024-12856: Four-Faith Industrial Router adjust_sys_time OS Command Injection

> Authenticated attackers can execute arbitrary OS commands via system time modification, with default credentials enabling unauthenticated remote code execution.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Dec 2024
- **Updated:** 22 Nov 2025
- **Also known as:** GHSA-5qv9-wh8x-pfpm

## What is CVE-2024-12856?

CVE-2024-12856 is a high-severity command injection vulnerability in Four-Faith F3x24, published on 27 Dec 2024. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The Four-Faith router models F3x24 and F3x36 are affected by an operating system (OS) command injection vulnerability. At least firmware version 2.0 allows authenticated and remote attackers to execute arbitrary OS commands over HTTP when modifying the system time via apply.cgi. Additionally, this firmware version has default credentials which, if not changed, would effectively change this vulnerability into an unauthenticated and remote OS command execution issue.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-1392 (Use of Default Credentials)

## Which versions are affected by CVE-2024-12856?

It affects 2 products.


Products: Four-Faith F3x24 Firmware, Four-Faith F3x36 Firmware.

## How do I fix CVE-2024-12856?

No fix has been published for CVE-2024-12856 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-12856 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-12856 exists.

Public exploit code:

- An exploit for Four-Faith routers to get a reverse shell (github_poc): https://github.com/nu113d/CVE-2024-12856

## Other vulnerabilities in Four-Faith F3x24

- [CVE-2019-12168](https://insights.sbomify.com/CVE-2019-12168/): Command injection in n/a (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-12856 and fix it if it is affected.

What it is: CVE-2024-12856 is a high-severity command injection vulnerability in Four-Faith F3x24, published on 27 Dec 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-12856 exists.

Affected product: Four-Faith F3x24. 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-2024-12856/ (Markdown: https://insights.sbomify.com/CVE-2024-12856/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-12856
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-12856
- OSV: https://osv.dev/vulnerability/CVE-2024-12856

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-12856/
Summaries are generated and may contain mistakes; the official description above is the record.