What it is
CVE-2024-12856 is Four-Faith Industrial Router adjust_sys_time OS Command Injection. The Four-Faith router models F3x24 and F3x36 are affected by an operating system (OS) command injection vulnerability. At least...
Vulnerability report
Exploited in the wild
High confidence
Not in CISA KEV
CVE-2024-12856
Four-Faith Industrial Router adjust_sys_time OS Command Injection
Four-Faith / F3x24 · 2.0
- Severity
- CVSS 7.2 · High
- Confidence
- High
- Exploit status
- Exploited in the wild
- EPSS
- 84.1%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. Previdian tracks this CVE as a known exploited vulnerability. Confidence is high. Also confirmed by third-party sources.
Who is affected?
Four-Faith / F3x24 2.0.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
The Four-Faith router models F3x24 and F3x36 are affected by an operating system (OS) command injection vulnerability
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.
Vendor
Product
Affected
Status
Four-Faith
Affected
F3x24
2.0
Affected
Four-Faith
Affected
F3x36
2.0
Affected
- Published
- 27 Dec 2024
- Exploitation Reported
- 03 Nov 2025
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- High
- User interaction
- None
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2024-12856
- Third-Party Advisory — vulncheck.com vulncheck.com · Third-Party Advisory https://vulncheck.com/advisories/four-faith-time
- Exploit — vulncheck.com vulncheck.com · Exploit https://vulncheck.com/blog/four-faith-cve-2024-12856
- Exploit — ducklingstudio.blog.fc2.com ducklingstudio.blog.fc2.com · Exploit https://ducklingstudio.blog.fc2.com/blog-entry-392.html
Exploitation evidence
Why Previdian marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
The Shadowserver
A trusted third party reported exploitation.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the Previdian Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| The Shadowserver First | 2025-11-03 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- User-Agents
- Callback hosts
- 0
- 0
- 0
Request targets and User-Agents available in Pro. Callback host details available in Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
7.2
High
Potential damage if exploited. Separate from whether attackers are using it.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS
84.1%
Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.
Timeline
From disclosure to observed exploitation
-
00:00 UTC
Added to Previdian KEV Feed
High-confidence, third-party attested exploitation
-
16:03 UTC
CVE published
Vulnerability disclosed publicly
-
16:13 UTC
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2024-12856
Sample API response{
"cve_id": "CVE-2024-12856",
"confidence": "High",
"cvss_score": 7.2,
"cvss_estimated": false,
"epss_score": 0.84124,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}