CVE-2026-4163 in WL-WN579A3
Summary
by MITRE • 03/16/2026
A vulnerability was detected in Wavlink WL-WN579A3 220323. This issue affects the function SetName/GuestWifi of the file /cgi-bin/wireless.cgi of the component POST Request Handler. Performing a manipulation results in command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used. Upgrading the affected component is recommended.
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Analysis
by VulDB Data Team • 03/16/2026
This vulnerability in Wavlink WL-WN579A3 firmware version 220323 represents a critical command injection flaw within the wireless configuration interface. The vulnerability specifically impacts the SetName/GuestWifi functionality of the /cgi-bin/wireless.cgi component, which processes POST requests from remote clients. The flaw allows attackers to inject malicious commands through manipulation of the wireless configuration parameters, potentially enabling full system compromise. This issue resides in the POST Request Handler component of the web interface, where input validation is insufficient to prevent malicious payload execution. The vulnerability's remote exploitability means that attackers can initiate attacks from external networks without requiring physical access to the device, making it particularly dangerous for networked environments. The public availability of exploitation tools increases the risk profile significantly, as the vulnerability can be leveraged by both skilled attackers and automated exploit frameworks. This type of vulnerability aligns with CWE-77 and CWE-88 categories, which specifically address command injection flaws in web applications where user-supplied data is improperly sanitized before being executed by the system shell. The attack surface is further expanded by the fact that this is a wireless access point device, meaning it typically operates in networked environments where it may be exposed to external threats. The impact of successful exploitation includes complete system compromise, unauthorized network access, potential data exfiltration, and the ability to use the device as a pivot point for attacking other systems within the local network. The vulnerability demonstrates a fundamental flaw in input sanitization and output encoding practices, where the application fails to properly validate or escape user-provided parameters before incorporating them into system commands. This weakness creates an environment where attackers can execute arbitrary commands with the privileges of the web server process, potentially leading to privilege escalation and persistent access to the network infrastructure. Organizations should immediately implement network segmentation to limit access to these devices, disable unnecessary services, and apply firmware updates as soon as they become available. The ATT&CK framework categorizes this vulnerability under T1059.001 for Command and Scripting Interpreter and T1021.001 for Remote Services, highlighting the attack vectors and techniques that can be employed. Network monitoring should be enhanced to detect unusual traffic patterns or command execution attempts that may indicate exploitation attempts. The device manufacturer should be contacted to verify if additional security measures or patches are available beyond the standard firmware update process, as this type of vulnerability often requires immediate remediation due to its public exploit availability and remote attack surface.