CVE-2024-9643
Published: 04 February 2025
Summary
CVE-2024-9643 is a critical-severity Active Debug Code (CWE-489) vulnerability in Four-Faith F3X36 Firmware. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 4.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-2 (Account Management) and IA-5 (Authenticator Management).
Deeper analysis
The Four-Faith F3x36 router running firmware version 2.0.0 is affected by an authentication bypass vulnerability in its administrative web server. The issue stems from hard-coded credentials (CWE-798) combined with active debug code exposure (CWE-489), allowing remote attackers to bypass normal login controls. The flaw carries a CVSS 3.1 score of 9.8 and is noted as similar to the earlier CVE-2023-32645.
An unauthenticated attacker with knowledge of the embedded credentials can submit specially crafted HTTP requests to the web interface and obtain full administrative control over the device. No user interaction or prior authentication is required, enabling complete compromise of confidentiality, integrity, and availability.
Public advisories from Talos and VulnCheck detail the hard-coded credential issue and reference the related TALOS-2023-1752 report, though no specific patch or firmware remediation steps are described in the available references.
EPSS scores for the CVE rose from lower values to a peak of 0.3857 on 2026-03-15 before receding to the current 0.1818, indicating a period of increased exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-50421
Vulnerability details
The Four-Faith F3x36 router using firmware v2.0.0 is vulnerable to authentication bypass due to hard-coded credentials in the administrative web server. An attacker with knowledge of the credentials can gain administrative access via crafted HTTP requests. This issue appears similar…
more
to CVE-2023-32645.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Hard-coded credentials enable direct remote admin access to public-facing web interface (T1190) via default/embedded account abuse (T1078.001).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
IA-5 mandates proper management of authenticators, prohibiting hard-coded credentials in the administrative web server to prevent authentication bypass.
AC-2 requires identification, management, and disabling of unnecessary accounts, directly addressing hard-coded administrative accounts that enable unauthorized access.
SC-7 enforces boundary protection to monitor and control network communications, blocking remote crafted HTTP requests to the vulnerable web server.