CVE-2024-46325 identifies a stack overflow vulnerability in the TP-Link WR740N V6 router, specifically triggered via the ssid parameter in the /userRpm/popupSiteSurveyRpm.htm endpoint. Stack overflow vulnerabilities (CWE-121) occur when a program writes more data to a buffer located on the stack than it can hold, potentially overwriting adjacent memory and leading to undefined behavior including crashes or arbitrary code execution. In this case, the vulnerability is exploitable remotely but requires the attacker to have local network access and low privileges (PR:L), with no user interaction needed (UI:N). The attack vector is adjacent network (AV:A), meaning the attacker must be on the same local network or connected via VPN. The CVSS v3.1 base score is 5.5 (medium), reflecting limited confidentiality, integrity, and availability impacts (C:L/I:L/A:L). The vulnerability could allow an attacker to cause denial of service or potentially execute code with the privileges of the router’s web management process. No patches or mitigations have been officially released yet, and no known exploits are reported in the wild. The affected device is a widely deployed consumer-grade router model, commonly used in home and small office environments. The vulnerability highlights the importance of secure input validation in embedded web interfaces of network devices.

The primary impact of CVE-2024-46325 is on the availability and integrity of the affected TP-Link WR740N V6 routers. Exploitation could cause the device to crash or reboot, resulting in denial of service for users relying on the router for internet connectivity. There is also a potential risk of partial compromise of the router’s firmware or execution of arbitrary code, which could lead to interception or manipulation of network traffic, undermining confidentiality and integrity. Since the vulnerability requires local network access and low privileges, attackers would typically need to be inside the victim’s network or have VPN access, limiting remote exploitation risks. However, in environments where the router’s management interface is exposed or poorly segmented, the risk increases. Organizations relying on these devices for critical connectivity or as part of IoT infrastructure could face operational disruptions and increased exposure to further attacks if exploited. The absence of patches and known exploits suggests the threat is currently theoretical but should be addressed proactively.

1. Restrict access to the router’s management interface by limiting it to trusted internal networks and disabling remote management if not required. 2. Implement network segmentation to isolate the router’s management interface from general user networks, reducing the risk of local network attackers. 3. Monitor network traffic for unusual requests targeting the /userRpm/popupSiteSurveyRpm.htm endpoint or abnormal SSID parameter values. 4. Regularly check TP-Link’s official support channels for firmware updates or security advisories addressing this vulnerability. 5. If possible, replace or upgrade affected devices with models that have received security patches or have more robust input validation. 6. Employ network intrusion detection systems (NIDS) with signatures for stack overflow attempts or malformed HTTP requests targeting router web interfaces. 7. Educate users about the risks of exposing router management interfaces and the importance of strong local network security controls. 8. Consider disabling SSID scanning features or related services if not necessary, to reduce the attack surface.