CVE-2024-57578 identifies a stack-based buffer overflow vulnerability in the Tenda AC18 router firmware version V15.03.05.19. The vulnerability arises from improper handling of the funcpara1 parameter within the formSetCfm function. When this parameter is supplied with crafted input, it causes a stack overflow condition, potentially leading to a denial of service (DoS) by crashing the router or causing unpredictable behavior. The vulnerability requires the attacker to have local network access and low privileges (PR:L), indicating that remote unauthenticated exploitation is not feasible. No user interaction is needed for exploitation, and the scope is unchanged, meaning the impact is limited to the vulnerable component. The CVSS v3.1 base score is 5.7, reflecting medium severity primarily due to the impact on availability (A:H) without affecting confidentiality or integrity. The weakness corresponds to CWE-120, a classic stack-based buffer overflow, which can be exploited to disrupt device operation. Currently, there are no known exploits in the wild, and no official patches have been released, highlighting the importance of proactive mitigation. This vulnerability affects consumer-grade networking equipment widely used in home and small office environments, making it a relevant concern for network stability and availability.

The primary impact of CVE-2024-57578 is on the availability of the affected Tenda AC18 routers. Successful exploitation can cause the device to crash or reboot, resulting in network downtime for users relying on the router for internet connectivity. This can disrupt business operations, especially for small offices or home offices that depend on stable network access. Although the vulnerability does not compromise confidentiality or integrity, the denial of service can indirectly affect productivity and operational continuity. Since exploitation requires local network access and low privileges, attackers who gain access to the internal network—such as malicious insiders or compromised devices—pose the greatest risk. The lack of known exploits in the wild reduces immediate threat levels, but the absence of patches means the vulnerability remains a latent risk. Organizations using Tenda AC18 routers should consider the potential for targeted attacks aiming to disrupt network availability, especially in environments where network uptime is critical.

To mitigate CVE-2024-57578, organizations should first restrict access to the router's management interface to trusted users and devices only, ideally limiting it to wired connections or VPN access rather than exposing it broadly on the local network. Network segmentation can reduce the risk by isolating critical systems from less trusted devices. Monitoring network traffic for unusual activity targeting router management functions can help detect exploitation attempts. Since no official patches are currently available, users should regularly check Tenda’s official channels for firmware updates addressing this vulnerability. As a temporary measure, rebooting the device after suspected exploitation can restore functionality, but this does not prevent re-exploitation. Deploying intrusion detection/prevention systems (IDS/IPS) with signatures for anomalous requests to the formSetCfm function may provide additional protection. Finally, organizations should consider replacing vulnerable devices with models from vendors with more robust security update practices if long-term mitigation is required.