CVE-2025-11301 identifies a buffer overflow vulnerability in the Belkin F9K1015 router firmware version 1.00.10. The vulnerability is located in an unspecified function handling requests to the /goform/formWlanSetupWPS endpoint. By manipulating the argument 'webpage' in this request, an attacker can cause a buffer overflow condition. This type of vulnerability typically allows an attacker to overwrite memory, potentially leading to arbitrary code execution or crashing the device, resulting in denial of service. The vulnerability is remotely exploitable over the network without requiring authentication or user interaction, significantly increasing the attack surface. The CVSS v4.0 score of 8.7 reflects the high impact on confidentiality, integrity, and availability, combined with low attack complexity and no prerequisites. The exploit code has been publicly released, increasing the likelihood of exploitation attempts. The vendor, Belkin, has not issued any response or patch, leaving devices vulnerable. This lack of remediation elevates the risk for organizations relying on this router model, especially in exposed network environments. The absence of patches necessitates immediate defensive measures to mitigate potential exploitation.

The impact of CVE-2025-11301 is substantial for organizations using the Belkin F9K1015 router with firmware version 1.00.10. Successful exploitation can lead to arbitrary code execution, allowing attackers to take control of the device, manipulate network traffic, or pivot into internal networks. This compromises confidentiality by exposing sensitive data, integrity by altering configurations or data, and availability by causing device crashes or network outages. Given the router's role as a network gateway, exploitation could facilitate broader network infiltration, data exfiltration, or disruption of business operations. The public availability of exploit code increases the risk of widespread attacks, including automated scanning and exploitation by opportunistic threat actors. The lack of vendor response and patches prolongs exposure, making mitigation challenging. Organizations with these devices in critical infrastructure, enterprise, or home office environments face elevated risks of service disruption, data breaches, and potential lateral movement by attackers.

1. Immediately isolate affected Belkin F9K1015 devices from untrusted networks, especially the internet, to reduce exposure. 2. Disable WPS functionality if configurable, as the vulnerability is linked to the WPS setup endpoint. 3. Implement strict network segmentation to limit access to the router's management interfaces only to trusted administrators. 4. Monitor network traffic for unusual requests targeting /goform/formWlanSetupWPS or signs of buffer overflow exploitation attempts. 5. Employ intrusion detection/prevention systems (IDS/IPS) with updated signatures to detect exploitation attempts. 6. If possible, replace affected devices with models from vendors with active security support and patching. 7. Maintain rigorous asset inventories to identify all impacted devices and track mitigation progress. 8. Engage with Belkin support channels regularly for any forthcoming patches or advisories. 9. Consider deploying network-level firewall rules to block suspicious HTTP requests targeting the vulnerable endpoint. 10. Educate network administrators about this vulnerability and ensure incident response plans include steps for potential exploitation scenarios.