CVE-2025-7094 is a critical security vulnerability identified in the Belkin F9K1122 router, specifically version 1.00.33. The flaw exists in the web interface component, within the function formBSSetSitesurvey located at /goform/formBSSetSitesurvey. The vulnerability arises from improper handling of the 'submit-url-ok' argument, which leads to a stack-based buffer overflow. This type of vulnerability allows an attacker to overwrite the stack memory, potentially enabling arbitrary code execution or causing a denial of service. The attack vector is remote and does not require user interaction or prior authentication, making it highly exploitable. The CVSS 4.0 base score is 8.7, indicating a high severity level. The vulnerability has been publicly disclosed, and although no known exploits are confirmed in the wild yet, the availability of a public exploit increases the risk of exploitation. The vendor, Belkin, has been contacted but has not responded or provided a patch, leaving affected devices exposed. This vulnerability could be leveraged by attackers to gain control over the router, intercept or manipulate network traffic, or pivot into internal networks, posing significant security risks to users and organizations relying on this device for network connectivity.

For European organizations, the impact of CVE-2025-7094 can be substantial. The Belkin F9K1122 router is commonly used in small to medium-sized business environments and residential settings. Exploitation could lead to unauthorized access to internal networks, data interception, and disruption of network services. Given the router’s role as a gateway device, compromise could facilitate lateral movement within corporate networks, enabling attackers to access sensitive information or deploy further malware. The lack of vendor response and patch availability exacerbates the risk, as organizations must rely on alternative mitigation strategies. Additionally, the potential for remote exploitation without authentication means attackers can target these devices en masse, increasing the likelihood of widespread impact. For European entities subject to strict data protection regulations such as GDPR, a breach resulting from this vulnerability could lead to regulatory penalties and reputational damage.

Since no official patch is currently available from Belkin, European organizations should implement the following specific mitigations: 1) Immediately isolate or replace affected Belkin F9K1122 devices with alternative routers from vendors with active security support. 2) Restrict remote management access to the router’s web interface by disabling WAN-side access or limiting it via firewall rules to trusted IP addresses only. 3) Monitor network traffic for unusual patterns indicative of exploitation attempts, such as malformed HTTP requests targeting /goform/formBSSetSitesurvey. 4) Employ network segmentation to limit the exposure of critical systems behind the vulnerable router. 5) Regularly audit and update router firmware when vendor patches become available. 6) Consider deploying intrusion detection/prevention systems (IDS/IPS) with signatures targeting this specific vulnerability or exploit patterns. 7) Educate IT staff about the vulnerability and ensure incident response plans include steps for dealing with potential exploitation. These measures, combined, can reduce the attack surface and limit the potential damage until a vendor patch is released.