CVE-2024-51014 identifies a stack-based buffer overflow vulnerability in the Netgear XR300 router firmware version 1.0.3.78. The flaw exists in the handling of the ssid_an parameter within the bridge_wireless_main.cgi script, which processes wireless bridge configuration requests. An attacker with low-level privileges can send a specially crafted POST request to this CGI endpoint, triggering a stack overflow condition. This overflow can cause the device to crash or reboot, resulting in a Denial of Service (DoS) that disrupts network connectivity. The vulnerability is classified under CWE-120 (Classic Buffer Overflow), indicating improper bounds checking on input data. The CVSS v3.1 base score is 5.7, reflecting medium severity, with attack vector as adjacent network (AV:A), low attack complexity (AC:L), requiring low privileges (PR:L), no user interaction (UI:N), unchanged scope (S:U), and impact limited to availability (A:H). No confidentiality or integrity impacts are noted. No public exploits or patches are currently available, and the vulnerability was published on November 5, 2024. The affected device is primarily used in consumer and small business environments, making exploitation feasible within local or adjacent network segments.

The primary impact of CVE-2024-51014 is a Denial of Service condition on affected Netgear XR300 routers, which can disrupt network availability for users relying on these devices. This can lead to temporary loss of internet connectivity, affecting business operations, remote work, and critical communications. Since the attack requires adjacency to the network, it is less likely to be exploited remotely over the internet unless the management interface is exposed. The lack of confidentiality or integrity impact limits the risk to data breaches or manipulation. However, repeated or targeted DoS attacks could degrade organizational network reliability and user productivity. Small businesses and home users relying on this router model are most vulnerable. The absence of known exploits reduces immediate risk but also means organizations should proactively monitor and prepare for potential future exploitation once exploit code becomes available.

To mitigate CVE-2024-51014, organizations should first verify if they use the Netgear XR300 router with firmware version 1.0.3.78. Since no patches are currently available, immediate steps include restricting access to the router’s management interfaces to trusted network segments only, ideally via VLAN segmentation or firewall rules that block adjacent network access to the vulnerable CGI endpoint. Network administrators should monitor HTTP POST requests targeting bridge_wireless_main.cgi for unusual or malformed payloads, which may indicate exploitation attempts. Disabling remote management features or changing default credentials can reduce exposure. Regularly checking for firmware updates from Netgear and applying them promptly once a patch is released is critical. Additionally, consider deploying network intrusion detection systems (NIDS) with custom signatures to detect attempts to exploit this stack overflow. For high-security environments, replacing affected devices with models not vulnerable to this issue may be warranted.