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VulnerabilityPublished Updated

CVE-2024-9644: Four-Faith F3x36 · Active Debug Code

Affects Four-Faith F3x36Source CVE Database V5

0

Not known to be exploited · CVSS 9.8 Critical.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Feb 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Four-Faith F3x36Affected
  • =2.0.0
Fixed in–

AI-suggested

Given the absence of official patches, European organizations should implement the following specific mitigations: 1) Restrict access to the administrative web interface of Four-Faith F3x36 routers by limiting management access to trusted IP addresses or via VPNs. 2) Employ network segmentation to isolate router management interfaces from general user networks and the internet. 3) Monitor network traffic for unusual requests to the "bapply.cgi" endpoint and implement intrusion detection/prevention systems (IDS/IPS) with custom signatures to detect exploitation attempts. 4) Disable or restrict HTTP management interfaces if possible, or replace with more secure management protocols such as SSH or dedicated management VLANs. 5) Conduct regular firmware audits and inventory to identify affected devices and prioritize their protection. 6) Engage with Four-Faith for firmware updates or advisories and apply patches promptly once available. 7) Implement strong logging and alerting on router configuration changes to detect unauthorized modifications quickly. 8) Educate network administrators about this vulnerability and ensure strict administrative credential policies to prevent chaining with authenticated vulnerabilities. 9) Consider deploying network access control (NAC) to prevent unauthorized devices from connecting to critical network segments. 10) Prepare incident response plans specifically addressing potential router compromise scenarios.

Description

CVE-2024-9644 is a critical authentication bypass vulnerability affecting the Four-Faith F3x36 router firmware version 2.0.0. The issue arises because the administrative web server fails to enforce authentication on certain administrative functions accessed via the "bapply.cgi" endpoint, unlike the normal "apply.cgi" endpoint. This allows a remote, unauthenticated attacker to modify router settings, potentially chaining with other vulnerabilities to escalate impact. The vulnerability has a CVSS score of 9.8, indicating critical severity with high impact on confidentiality, integrity, and availability. No patches are currently available, and no known exploits have been reported in the wild yet.

References

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