CVE-2025-11292 is a command injection vulnerability identified in the Belkin F9K1015 router firmware version 1.00.10. The vulnerability resides in an unspecified function handling the /goform/formBSSetSitesurvey endpoint, specifically in the processing of the wan_ipaddr parameter. By crafting malicious input for wan_ipaddr, an attacker can inject and execute arbitrary system commands on the device remotely. The attack vector requires no authentication or user interaction, making it highly accessible to remote attackers. The vulnerability was publicly disclosed on October 5, 2025, with exploit code made available, increasing the risk of exploitation. Despite early notification, Belkin has not responded or issued patches, leaving the vulnerability unmitigated at the vendor level. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and low impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). This suggests that while exploitation is straightforward, the overall impact is moderate, potentially allowing attackers to execute commands that could disrupt device operation or compromise network traffic. The lack of vendor response and public exploit availability heighten the urgency for affected users to implement compensating controls. The vulnerability affects a specific firmware version, so devices running other versions may not be vulnerable. However, given the lack of patch, affected devices remain at risk. The vulnerability's exploitation could lead to network compromise, data interception, or pivoting to internal networks, posing significant risks to organizations relying on these routers.

For European organizations, this vulnerability poses a moderate risk primarily to network security and device integrity. Successful exploitation could allow attackers to execute arbitrary commands on the router, potentially leading to unauthorized access to internal networks, interception or manipulation of network traffic, and disruption of network services. Organizations using Belkin F9K1015 routers in critical infrastructure, small to medium enterprises, or home office environments may face increased exposure due to the device's role as a network gateway. The public availability of exploit code increases the likelihood of opportunistic attacks, especially from automated scanning and exploitation tools. The lack of vendor patching means that affected organizations must rely on alternative mitigation strategies. The impact on confidentiality, integrity, and availability is low to moderate but could escalate if attackers leverage the router as a foothold for broader network compromise. European entities with limited network segmentation or outdated device inventories are particularly vulnerable. Additionally, the vulnerability could be exploited to launch attacks against other connected systems, amplifying the threat. The medium severity rating reflects these considerations, but the real-world impact depends on the deployment context and compensating controls in place.

Given the absence of an official patch from Belkin, European organizations should implement the following specific mitigations: 1) Conduct a thorough inventory to identify all Belkin F9K1015 devices running firmware version 1.00.10. 2) Immediately isolate affected devices from untrusted networks, especially the internet, by restricting WAN access to management interfaces. 3) Employ network segmentation to limit the router's ability to access critical internal systems. 4) Deploy intrusion detection and prevention systems (IDS/IPS) with signatures targeting known exploit patterns for this vulnerability. 5) Monitor network traffic for unusual command injection attempts targeting the /goform/formBSSetSitesurvey endpoint. 6) Where feasible, replace vulnerable devices with alternative routers from vendors with active security support. 7) Disable or restrict remote management features on affected routers to reduce attack surface. 8) Implement strict firewall rules to block unauthorized access to router management URLs. 9) Educate IT staff about the vulnerability and signs of exploitation to enable rapid incident response. 10) Regularly review and update network device inventories and firmware versions to prevent similar risks. These targeted actions go beyond generic advice by focusing on device identification, network controls, and proactive monitoring tailored to this specific vulnerability and device.