CVE-2024-12856
HighExploitedPublic exploitThe Four-Faith router models F3x24 and F3x36 are affected by an operating system (OS) command injection vulnerability.
Published Dec 27, 2024 · Updated Nov 22, 2025
Key Facts
Patch immediately- CVE-2024-12856 is a high-severity vulnerability (CVSS 7.2 v3.1) affecting F3x24 Firmware (Four-Faith), F3x36 Firmware (Four-Faith), F3x24 and 1 more product.
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Nov 9, 2024. Public exploit code is available.
- EPSS estimates a 84% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.2
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
84%
Higher than 99.6% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2024-12856 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Nov 9, 2024 | n/a | Not reported |
| CIRCL KEV | Feb 8, 2025 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| F3x24 FirmwareFour-Faith | 2.0 | n/a |
| F3x36 FirmwareFour-Faith | 2.0 | n/a |
| F3x24 | >= 2.0 | n/a |
| F3x36 | >= 2.0 | n/a |
Timeline
Added to Industry KEV feed
Nov 9, 2024
Publicly disclosed
Dec 27, 2024
Added to CIRCL KEV
Feb 8, 2025
Last updated
Nov 22, 2025
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
- CWE-1392 Use of Default Credentials
References
- advisoryhttps://vulncheck.com/advisories/four-faith-time
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
The Four-Faith router models F3x24 and F3x36 are affected by an operating system (OS) command injection vulnerability.
Affected: F3x24 Firmware (Four-Faith) versions 2.0; F3x36 Firmware (Four-Faith) versions 2.0; F3x24 versions >= 2.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Nov 9, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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