CVE-2025-14879 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/onSSIDChange endpoint. An attacker can remotely manipulate the ssid_index parameter in the HTTP request to cause a stack-based buffer overflow. This overflow can lead to arbitrary code execution, potentially allowing an attacker to take full control of the affected device. The vulnerability requires no authentication or user interaction, making it highly exploitable over the network. The CVSS 4.0 score of 9.3 reflects the critical nature of this flaw, with an attack vector classified as network-based, low attack complexity, and no privileges or user interaction required. Although no active exploitation has been reported, a public exploit is available, increasing the likelihood of attacks. The vulnerability impacts the confidentiality, integrity, and availability of the device, potentially enabling attackers to disrupt network operations, intercept or manipulate traffic, or use the device as a foothold for further network compromise. The lack of an official patch at the time of disclosure necessitates immediate mitigation efforts by affected organizations.

For European organizations, this vulnerability poses a significant risk to network security and operational continuity. Exploitation could lead to unauthorized control over Tenda WH450 devices, allowing attackers to intercept sensitive communications, disrupt network services, or pivot to internal networks for further compromise. Critical sectors such as government, finance, healthcare, and telecommunications that rely on secure and stable network infrastructure could face severe operational disruptions and data breaches. The remote and unauthenticated nature of the exploit increases the attack surface, especially for organizations with exposed network management interfaces or insufficient perimeter defenses. Additionally, the availability of a public exploit heightens the urgency for mitigation to prevent widespread exploitation across European networks.

1. Monitor Tenda's official channels for firmware updates or patches addressing CVE-2025-14879 and apply them immediately upon release. 2. Implement network segmentation to isolate Tenda WH450 devices from critical network segments and sensitive data repositories. 3. Restrict access to device management interfaces by limiting exposure to trusted IP addresses and employing VPNs for remote management. 4. Deploy intrusion detection and prevention systems (IDS/IPS) with signatures or heuristics capable of detecting anomalous HTTP requests targeting /goform/onSSIDChange or unusual ssid_index parameter values. 5. Conduct regular network traffic analysis to identify and block suspicious activities related to this vulnerability. 6. Consider temporary replacement or removal of vulnerable devices from critical environments until patches are available. 7. Educate network administrators about the vulnerability and encourage vigilance for signs of exploitation.