Cyber Resilience

CVE-2024-39280

CriticalPublic PoC

Published: 14 January 2025

Published
14 January 2025
Modified
21 August 2025
KEV Added
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Patch
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CVSS Score v3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS Score 0.0585 90.8th percentile
Risk Priority 22 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-39280 is a critical-severity External Control of System or Configuration Setting (CWE-15) 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 9.2% 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-2024-39280 is an external config control vulnerability (CWE-15) in the nas.cgi set_smb_cfg() function of the Wavlink AC3000 router running firmware M33A8.V5030.210505. A specially crafted HTTP request can inject configuration values that result in arbitrary command execution on the device.

An authenticated attacker with network access can exploit the flaw by sending a malicious HTTP request. Successful exploitation grants the attacker command execution with high impact to confidentiality, integrity, and availability, and the vulnerability carries a CVSS 3.1 score of 9.1 due to its network attack vector, low complexity, and changed scope.

The referenced Talos Intelligence reports (TALOS-2024-2055) provide the technical details of the issue. The associated EPSS score has remained low, with a current value of 0.0585 and a peak of 0.0606.

EU & UK References

Vulnerability details

An external config control vulnerability exists in the nas.cgi set_smb_cfg() 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 this vulnerability.

CWE(s)
CWE-15

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
Why these techniques?

Vulnerability in router web CGI endpoint (nas.cgi) directly enables remote authenticated RCE via crafted HTTP request, mapping to public-facing app exploitation and Unix shell command execution on network device.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2024-38666Same product: Wavlink Wl-Wn533A8
CVE-2024-39800Same product: Wavlink Wl-Wn533A8
CVE-2024-39793Same product: Wavlink Wl-Wn533A8
CVE-2024-39799Same product: Wavlink Wl-Wn533A8
CVE-2024-39788Same product: Wavlink Wl-Wn533A8
CVE-2024-39790Same product: Wavlink Wl-Wn533A8
CVE-2024-39794Same product: Wavlink Wl-Wn533A8
CVE-2024-39789Same product: Wavlink Wl-Wn533A8
CVE-2024-39795Same product: Wavlink Wl-Wn533A8
CVE-2024-39602Same product: Wavlink Wl-Wn533A8

Affected Assets

wavlink
wl-wn533a8 firmware
m33a8.v5030.210505

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly prevents arbitrary command execution by requiring input validation on specially crafted HTTP requests to the nas.cgi set_smb_cfg() endpoint.

SI-2 Flaw Remediation good match
prevent

Requires timely patching of the command injection flaw in the Wavlink router firmware to eliminate the vulnerability.

CM-5 Access Restrictions for Change partial match
prevent

Enforces logical access restrictions to configuration change functions like set_smb_cfg(), limiting exploitation to only high-privilege authenticated users.

References