The vulnerability identified as CVE-2025-55482 affects the Tenda AC6 router firmware version V15.03.06.23_multi. It is a buffer overflow vulnerability located in the formSetCfm function. Buffer overflow vulnerabilities occur when a program writes more data to a buffer than it can hold, potentially overwriting adjacent memory. This can lead to arbitrary code execution, crashes, or other unintended behavior. In this case, the formSetCfm function, which likely handles configuration form data or similar input, does not properly validate or limit input size, allowing an attacker to overflow the buffer. Although specific technical details such as the exact input vector or the nature of the overflow are not provided, the vulnerability's presence in a router firmware component suggests that exploitation could allow remote attackers to execute arbitrary code or cause denial of service on the device. The lack of a CVSS score and absence of known exploits in the wild indicate that this vulnerability is newly disclosed and may not yet be actively exploited. However, routers like the Tenda AC6 are commonly used in home and small office environments, making them attractive targets for attackers seeking to compromise network infrastructure or pivot into internal networks. The vulnerability's exploitation would likely require network access to the router's management interface or a service exposed by the router, but the exact attack vector is not specified. No patches or mitigation links are currently available, indicating that users and administrators must be vigilant and monitor for updates from the vendor.

For European organizations, the impact of this vulnerability could be significant, especially for small and medium enterprises (SMEs) and home office users relying on Tenda AC6 routers. Successful exploitation could lead to unauthorized control over the router, allowing attackers to intercept, modify, or redirect network traffic, degrade network availability, or use the compromised device as a foothold for further attacks within the organization's network. This could result in data breaches, disruption of business operations, and potential exposure of sensitive information. Given the widespread use of consumer-grade routers in European households and smaller organizations, the vulnerability could also affect remote workers and telecommuters, increasing the attack surface. Additionally, compromised routers could be enlisted in botnets for distributed denial-of-service (DDoS) attacks, indirectly impacting European internet infrastructure and services. The absence of known exploits currently reduces immediate risk, but the potential for rapid weaponization once exploit code becomes available necessitates proactive measures.

Since no official patches or updates are currently available from Tenda, European organizations and users should implement the following specific mitigations: 1) Restrict access to the router's management interface by disabling remote management features and limiting access to trusted IP addresses or local networks only. 2) Change default credentials to strong, unique passwords to prevent unauthorized access. 3) Monitor network traffic for unusual activity that could indicate exploitation attempts, such as unexpected outbound connections or spikes in traffic. 4) Segment networks to isolate critical systems from devices using vulnerable routers, reducing potential lateral movement. 5) Regularly check for firmware updates from Tenda and apply them promptly once available. 6) Consider replacing vulnerable Tenda AC6 devices with routers from vendors with a stronger security track record if immediate patching is not feasible. 7) Educate users about the risks of using default or weak router configurations and encourage secure network practices. These targeted steps go beyond generic advice by focusing on access control, monitoring, and network segmentation specific to the nature of this router vulnerability.