CVE-2025-11301 is a high-severity buffer overflow vulnerability identified in the Belkin F9K1015 router, specifically affecting firmware version 1.00.10. The vulnerability resides in an unspecified function related to the /goform/formWlanSetupWPS endpoint, which is used for WLAN setup via WPS (Wi-Fi Protected Setup). By manipulating the argument passed to this webpage, an attacker can trigger a buffer overflow condition. This type of vulnerability can lead to memory corruption, potentially allowing remote code execution or denial of service. The attack vector is remote network access, requiring no user interaction and no prior authentication, making exploitation relatively straightforward. The vendor was notified early but has not responded or issued a patch, and a public exploit is available, increasing the risk of exploitation. The CVSS 4.0 score is 8.7 (high), reflecting the vulnerability's ease of exploitation (network attack vector, low complexity), lack of required privileges or user interaction, and the high impact on confidentiality, integrity, and availability. The absence of a patch and public exploit availability make this a critical concern for users of the affected device and firmware version.

For European organizations, the impact of this vulnerability can be significant, especially for those relying on Belkin F9K1015 routers in their network infrastructure. Successful exploitation could allow attackers to execute arbitrary code remotely, leading to full compromise of the device. This can result in interception or manipulation of network traffic, lateral movement within corporate networks, disruption of network services, and potential data breaches. Given the router’s role as a gateway device, attackers could establish persistent footholds or pivot to more sensitive internal systems. The lack of vendor response and patch availability increases the window of exposure. Small and medium enterprises (SMEs) and home offices using this router model are particularly at risk, as they may lack advanced security monitoring or rapid patch management capabilities. Additionally, critical infrastructure or public sector organizations using this device could face operational disruptions or espionage risks.

1. Immediate mitigation should include isolating the affected Belkin F9K1015 devices from untrusted networks, especially the internet, to reduce exposure. 2. Disable WPS functionality if possible, as the vulnerability is linked to the WPS setup endpoint. 3. Implement network segmentation to limit access to the router’s management interfaces only to trusted administrators. 4. Monitor network traffic for unusual activity or signs of exploitation attempts targeting the /goform/formWlanSetupWPS endpoint. 5. Employ intrusion detection/prevention systems (IDS/IPS) with updated signatures to detect attempts exploiting this vulnerability. 6. Consider replacing the affected devices with alternative routers from vendors with active security support if patching is not forthcoming. 7. Maintain strict access controls and logging on network devices to facilitate incident response. 8. Stay alert for any vendor updates or third-party patches and apply them promptly once available.