CVE-2025-57217 is a stack overflow vulnerability identified in the firmware version 16.03.10.09_multi_TDE01 of the Tenda AC10 v4.0 wireless router. The vulnerability arises from improper handling of the Password parameter within the function R7WebsSecurityHandler. A stack overflow occurs when data exceeds the buffer capacity allocated on the call stack, potentially allowing an attacker to overwrite adjacent memory. This can lead to arbitrary code execution, denial of service, or system crashes. Since the flaw is in the password handling routine, it is likely exploitable remotely if the affected function is accessible via the router’s web management interface or other network-facing services. The lack of a CVSS score and absence of known exploits in the wild indicates this vulnerability is newly disclosed and may not yet be actively exploited. However, the nature of stack overflows in embedded device firmware is critical because they can allow attackers to gain control over the device, bypass authentication, or disrupt network operations. The vulnerability affects a specific firmware version of a widely used consumer-grade router model, which is often deployed in home and small office environments. The technical details do not specify whether authentication is required to trigger the vulnerability, but since it involves password parameter processing, it may be exploitable without prior authentication if the interface is exposed. No patches or mitigation links are currently available, suggesting that users of the affected firmware remain vulnerable until an update is released.

For European organizations, the impact of this vulnerability can be significant, particularly for small and medium enterprises (SMEs) and home office users relying on the Tenda AC10 v4.0 router for network connectivity. Successful exploitation could allow attackers to execute arbitrary code on the router, leading to full compromise of the device. This could result in interception or manipulation of network traffic, unauthorized access to internal networks, and potential pivoting to other critical systems. The disruption of network availability could also affect business continuity. Given the router’s role as a network gateway, exploitation could undermine confidentiality, integrity, and availability of organizational data. Additionally, compromised routers could be recruited into botnets, amplifying broader cyber threats. The absence of known exploits currently reduces immediate risk, but the vulnerability’s presence in a common consumer device means that widespread scanning and exploitation attempts could emerge rapidly once public details are known.

Organizations and users should first verify if they are running the affected firmware version 16.03.10.09_multi_TDE01 on Tenda AC10 v4.0 routers. Since no official patch is currently available, immediate mitigation steps include restricting access to the router’s management interface by disabling remote administration and limiting management access to trusted internal networks only. Changing default credentials and ensuring strong, unique passwords can reduce risk if authentication is required. Network segmentation should be employed to isolate vulnerable devices from critical infrastructure. Monitoring network traffic for unusual activity and deploying intrusion detection systems can help identify exploitation attempts. Users should subscribe to vendor advisories and apply firmware updates promptly once a patch is released. As a longer-term measure, organizations should consider replacing vulnerable devices with models that have a strong security track record and receive regular firmware updates.