CVE-2025-14878 is a stack-based buffer overflow vulnerability identified in the Tenda WH450 router firmware version 1.0.0.18. The vulnerability resides in the HTTP Request Handler component, specifically within the /goform/wirelessRestart endpoint. An attacker can manipulate the GO argument in the HTTP request to cause a stack-based buffer overflow, which can lead to arbitrary code execution. This flaw is remotely exploitable without requiring any authentication or user interaction, making it highly accessible to attackers. The vulnerability affects the core firmware handling wireless restart requests, which is a critical function in the router's operation. The CVSS 4.0 base score is 9.3, reflecting the ease of exploitation (network attack vector, no privileges or user interaction needed) and the high impact on confidentiality, integrity, and availability. Although no active exploitation has been reported in the wild, a public exploit has been released, increasing the likelihood of future attacks. The lack of available patches at the time of disclosure means that affected users must rely on mitigation strategies until an official firmware update is released. The vulnerability's critical nature stems from the potential for remote attackers to gain control over the device, disrupt network operations, or pivot into internal networks.

The impact of CVE-2025-14878 is severe for organizations using Tenda WH450 routers, as successful exploitation can lead to full compromise of the device. Attackers could execute arbitrary code remotely, potentially gaining administrative control over the router. This control can be leveraged to intercept, modify, or disrupt network traffic, degrade network availability, or launch further attacks against internal systems. Confidential information passing through the router could be exposed or manipulated, affecting data integrity and privacy. The vulnerability could also be used to create persistent backdoors or launch distributed denial-of-service (DDoS) attacks using compromised devices. Given the router's role as a network gateway, exploitation could have cascading effects on organizational security posture, especially in environments lacking network segmentation or additional security controls. The public availability of an exploit increases the risk of widespread attacks, particularly targeting unpatched or poorly secured networks.

1. Immediate network-level mitigation: Restrict access to the /goform/wirelessRestart endpoint by implementing firewall rules or access control lists (ACLs) to block unauthorized external traffic targeting this URI. 2. Network segmentation: Isolate Tenda WH450 devices from critical internal networks to limit the impact of potential compromise. 3. Monitor network traffic and logs for unusual or suspicious HTTP requests targeting the vulnerable endpoint, especially those containing the GO argument. 4. Disable remote management features on the router if not required, reducing the attack surface. 5. Apply vendor-provided firmware updates as soon as they become available to patch the vulnerability. 6. If patching is delayed, consider temporary device replacement or use of alternative secure network equipment. 7. Educate network administrators about this vulnerability and ensure incident response plans include detection and remediation steps for exploitation attempts. 8. Employ intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics capable of identifying exploitation attempts targeting this vulnerability.