CVE-2025-7465 is a critical buffer overflow vulnerability identified in the Tenda FH1201 router, specifically affecting firmware version 1.2.0.14. The vulnerability resides in the HTTP POST request handler component, within the function fromRouteStatic located at the endpoint /goform/fromRouteStatic. The flaw is triggered by manipulating the 'page' argument in the HTTP POST request, which leads to a buffer overflow condition. This type of vulnerability can allow an attacker to overwrite memory adjacent to the buffer, potentially enabling arbitrary code execution, denial of service, or system crashes. The vulnerability is remotely exploitable without requiring user interaction or authentication, making it highly dangerous. The CVSS 4.0 base score is 8.7 (high severity), reflecting the ease of exploitation (network attack vector, low attack complexity), no privileges required, and no user interaction needed. The vulnerability impacts the confidentiality, integrity, and availability of the device, as successful exploitation could allow attackers to execute arbitrary code with elevated privileges, potentially taking full control of the router. Although no public exploits are currently known to be actively used in the wild, the exploit details have been publicly disclosed, increasing the risk of imminent exploitation by threat actors. The lack of available patches at the time of disclosure further exacerbates the risk for affected users. Given that Tenda FH1201 routers are commonly deployed in home and small office environments, exploitation could lead to compromised network infrastructure, interception of network traffic, and pivoting attacks into internal networks.

For European organizations, especially small and medium enterprises (SMEs) and residential users relying on Tenda FH1201 routers, this vulnerability poses a significant risk. Compromise of these routers can lead to unauthorized access to internal networks, interception of sensitive communications, and disruption of internet connectivity. In sectors where secure communications are critical, such as finance, healthcare, and government services, exploitation could result in data breaches, loss of confidentiality, and operational downtime. Additionally, compromised routers can be leveraged as entry points for broader cyberattacks, including lateral movement within corporate networks or launching distributed denial-of-service (DDoS) attacks. The remote and unauthenticated nature of the exploit increases the attack surface, especially in environments where these routers are directly exposed to the internet without adequate network segmentation or firewall protections. The absence of patches at disclosure time means organizations must rely on mitigating controls to reduce exposure until firmware updates become available.

1. Immediate network segmentation: Isolate Tenda FH1201 devices from critical network segments to limit potential lateral movement if compromised. 2. Restrict remote access: Disable remote management interfaces on the router or restrict access to trusted IP addresses only. 3. Implement firewall rules: Block inbound HTTP POST requests to the /goform/fromRouteStatic endpoint from untrusted networks to prevent exploitation attempts. 4. Monitor network traffic: Deploy intrusion detection/prevention systems (IDS/IPS) tuned to detect anomalous HTTP POST requests targeting the vulnerable endpoint. 5. Firmware updates: Continuously monitor Tenda’s official channels for firmware patches addressing CVE-2025-7465 and apply updates promptly once available. 6. Device replacement: For high-risk environments, consider replacing affected Tenda FH1201 routers with devices from vendors with a stronger security track record and timely patch management. 7. User awareness: Educate users about the risks of exposing routers to the internet and encourage secure configuration practices. 8. Incident response readiness: Prepare to detect and respond to potential exploitation attempts by maintaining updated logs and having a response plan for compromised devices.