CVE-2024-39785
Published: 14 January 2025
Summary
CVE-2024-39785 is a critical-severity Injection (CWE-74) vulnerability in Wavlink Wl-Wn533A8 Firmware. Its CVSS base score is 9.1 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 30.6% 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 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2024-39785 consists of multiple command execution vulnerabilities in the nas.cgi add_dir() functionality of the Wavlink AC3000 router running firmware version M33A8.V5030.210505. A specially crafted HTTP request can lead to arbitrary command execution, with a specific command injection issue in the adddir_name POST parameter. These flaws fall under CWE-74 (Improper Neutralization of Special Elements used in an OS Command) and were published on 2025-01-14 with a CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
An attacker with high privileges can exploit these vulnerabilities by sending an authenticated HTTP request to the affected nas.cgi endpoint. Successful exploitation grants arbitrary command execution on the device, potentially allowing full compromise including data exfiltration, persistence, or further network pivoting given the high-impact CVSS metrics across confidentiality, integrity, and availability in a scoped attack.
Mitigation guidance is detailed in the Talos Intelligence advisory at https://talosintelligence.com/vulnerability_reports/TALOS-2024-2058.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-38377
Vulnerability details
Multiple command execution vulnerabilities exist in the nas.cgi add_dir() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to arbitrary command execution. An attacker can make an authenticated HTTP request to trigger these vulnerabilities.A command injection vulnerability…
more
exists in the adddir_name POST parameter.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct command injection in exposed nas.cgi web endpoint enables remote exploitation of public-facing application (T1190) and arbitrary Unix shell command execution (T1059.004) on the router.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly mitigates command injection (CWE-74) in the adddir_name POST parameter by requiring validation and sanitization of inputs before use in OS commands within nas.cgi.
Requires timely identification, reporting, and correction of the specific command execution flaws in nas.cgi add_dir() functionality of the vulnerable firmware.
Enforces least privilege to limit high-privilege (PR:H) accounts capable of sending authenticated HTTP requests that trigger the vulnerabilities.