CVE-2025-50263 is a buffer overflow vulnerability identified in the Tenda AC6 router firmware version v15.03.05.16_multi. The flaw exists within the fromSetRouteStatic function, which processes the 'list' parameter. 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, denial of service, or system crashes. In this case, exploitation of the buffer overflow could allow an attacker to execute arbitrary code with the privileges of the affected process, potentially leading to full compromise of the router device. Since the vulnerability is in a router firmware component responsible for static route configuration, an attacker might exploit this remotely if the vulnerable function is exposed via network interfaces or management services. However, the exact attack vector is not detailed in the provided information. No CVSS score is assigned yet, and no known exploits are currently reported in the wild. The absence of patch links suggests that a fix may not be publicly available at this time. Given the critical role of routers in network infrastructure, exploitation could allow attackers to intercept, redirect, or disrupt network traffic, impacting confidentiality, integrity, and availability of connected systems.

For European organizations, this vulnerability poses a significant risk due to the widespread use of Tenda AC6 routers in small to medium enterprises and residential environments. Compromise of these routers could enable attackers to perform man-in-the-middle attacks, intercept sensitive communications, or disrupt network connectivity. This is particularly concerning for organizations handling sensitive personal data under GDPR, as unauthorized access or data interception could lead to regulatory penalties and reputational damage. Additionally, compromised routers could be leveraged as footholds for lateral movement within corporate networks or as part of botnets for broader attacks. The lack of a patch and known exploits in the wild currently limits immediate risk, but the potential for exploitation remains high if attackers develop reliable exploits. European organizations relying on these devices should consider the risk of exposure, especially if remote management interfaces are enabled or if the devices are accessible from untrusted networks.

1. Immediate mitigation should include disabling remote management interfaces on Tenda AC6 routers to reduce exposure to external attackers. 2. Network segmentation should be enforced to isolate routers from critical internal systems, limiting the impact of a potential compromise. 3. Monitor network traffic for unusual patterns that could indicate exploitation attempts, such as unexpected route changes or anomalous packets targeting router management services. 4. Implement strict access controls and authentication mechanisms for router management interfaces, including strong passwords and, if supported, multi-factor authentication. 5. Regularly check for firmware updates from Tenda and apply patches promptly once available. 6. Consider replacing vulnerable devices with alternative routers from vendors with a strong security track record if patches are delayed. 7. Conduct internal vulnerability assessments and penetration testing focusing on network infrastructure devices to identify and remediate similar risks proactively.