Overview
This article delves into the specifics of a severe vulnerability, CVE-2025-50756, found in Wavlink WN535K3 20191010. This particular vulnerability poses a significant threat due to its ability to allow attackers to execute arbitrary commands via a crafted request. The danger extends to any system or network utilizing the Wavlink WN535K3, making it a crucial point of focus for cybersecurity professionals, system administrators, and any individuals or businesses using the affected product. Understanding and mitigating this vulnerability is of paramount importance due to its potential for system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-50756
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Impact: System compromise, potential data leakage
Affected Products
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Product | Affected Versions
Wavlink | WN535K3 20191010
How the Exploit Works
The exploit takes advantage of a command injection vulnerability in the set_sys_adm function via the newpass parameter in Wavlink WN535K3. An attacker, by crafting a specific request, can utilize this vulnerability to execute arbitrary commands on the system. This means that an attacker can potentially gain unauthorized access to the system and possibly manipulate or steal sensitive data.
Conceptual Example Code
The following is a conceptual example of how this vulnerability might be exploited. This example presumes the attacker has the necessary privileges and has crafted a malicious payload to exploit the vulnerability.
POST /set_sys_adm HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
newpass=; [Insert Malicious Command Here]In this request, the attacker replaces “[Insert Malicious Command Here]” with a specific command that they wish to execute on the system. This command could potentially allow them access to sensitive information, the ability to manipulate system settings, or even control over the entire system.
Mitigation
The most effective mitigation against this vulnerability is to apply the vendor patch as soon as it becomes available. This will fix the vulnerability and prevent attackers from being able to exploit it. In the meantime, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation. Both of these solutions can detect and prevent attempts to exploit this vulnerability, protecting your system until a permanent fix is applied.