A weakness has been identified in Edimax BR-6428nC versions up to 1.16. This vulnerability allows for command injection due to improper handling of the arguments pppUserName and pptpUserName in the /goform/setWAN function of the web interface. The attack can be initiated remotely, making it particularly concerning for organizations that utilize this device.
The CVSS score for this vulnerability is 2.1, indicating a low severity level. Despite the low score, the potential for remote exploitation means that organizations should not underestimate its impact. The exploit has been made available to the public, which raises the urgency for defenders to address this vulnerability.
Organizations using affected devices should prioritize patching immediately, as the vendor did not respond to early disclosures regarding this vulnerability. Failure to address this issue could lead to unauthorized access and subsequent exploitation.
In summary, although the severity is classified as low, the remote exploitability of this command injection vulnerability necessitates immediate attention from security teams to mitigate potential risks.
Vulnerability Details
The vulnerability, classified under CWE-74 (Improper Neutralization of Special Elements), and CWE-77 (Improper Neutralization of Special Elements used in a Command ('Command Injection')), was disclosed on May 3, 2026. It affects the Edimax BR-6428nC router versions up to 1.16. The vulnerability allows remote attackers to execute arbitrary commands on the affected system due to insufficient validation of user-supplied input.
The CVSS 3.1 score of 6.3 indicates a medium severity, highlighting that while the attack complexity is low and requires low privileges, it can have a significant impact on confidentiality, integrity, and availability.
Technical Analysis
The root cause of this vulnerability stems from inadequate input validation on the /goform/setWAN function. The nature of the command injection allows attackers to execute arbitrary commands, potentially compromising the device's functionality. The attack vector is network-based, requiring low complexity and low privileges, with no user interaction needed.
Given the low attack complexity and the fact that it does not require user interaction, this vulnerability poses a notable risk. The impacts on confidentiality, integrity, and availability are assessed as low, but the potential for remote command execution remains a serious threat.
Risk & Impact Analysis
Risk to organizations includes unauthorized command execution, which can lead to further exploitation of the network and compromise of sensitive data. The blast radius could extend to any network connected to the affected device, increasing the urgency for organizations to address this vulnerability.
Although the CVSS score indicates a low severity, the availability of the exploit to the public escalates the risk level. Organizations should schedule remediation as part of their priority patch cycle to mitigate any potential impact.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected by this vulnerability. Users should verify if their devices are running on versions up to 1.16 of the Edimax BR-6428nC.
Mitigation & Remediation
Organizations should prioritize patching immediately. The vendor has not released a patch as of this writing, so users must monitor for updates from Edimax regarding a fix for this vulnerability.
In the absence of a patch, users should consider implementing network controls to restrict access to the device, ensuring that only trusted networks can reach it. Additionally, monitoring network traffic for unusual commands being sent to the device may help identify potential exploitation attempts.
For further guidance on validating remediation effectiveness, organizations can utilize penetration testing services.
Detection Guidance
Organizations should monitor for logs indicating unusual activity related to the /goform/setWAN function. This includes any unexpected command executions or unauthorized changes to user credentials.
Behavioral anomalies such as repeated login attempts or changes in configuration settings should also be flagged for further investigation.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in the growing trend of command injection vulnerabilities within networking devices. As more organizations rely on such devices, the potential impact of these vulnerabilities increases, necessitating proactive security measures.
Security teams can learn from this vulnerability by ensuring that proper input validation is implemented across all components of their network infrastructure. This includes regularly reviewing and updating firmware to mitigate any potential exploits.
For deeper insights into vulnerability management, organizations may consider exploring vulnerability management best practices and penetration testing methodologies to strengthen their defenses.
Overall, this vulnerability should serve as a reminder of the importance of regular security assessments and the need for organizations to stay informed about potential risks associated with their network devices.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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