CVE-2025-57215 is a stack overflow vulnerability identified in the firmware version 16.03.10.20 of the Tenda AC10 v4.0 wireless router. The vulnerability arises from the function get_parentControl_list_Info, which likely processes input data without proper bounds checking, leading to a stack overflow condition. Stack overflow vulnerabilities occur when a program writes more data to a buffer located on the stack than it can hold, potentially overwriting adjacent memory. This can lead to arbitrary code execution, denial of service, or system crashes if exploited. Given the nature of the affected device—a consumer-grade wireless router—successful exploitation could allow an attacker to execute arbitrary code with elevated privileges on the device, potentially gaining control over the router's firmware. This could enable interception or manipulation of network traffic, unauthorized access to connected devices, or pivoting into the internal network. The vulnerability does not currently have a CVSS score, and no known exploits have been reported in the wild as of the publication date. The lack of a patch or mitigation details suggests that the vendor has not yet released an update addressing this issue. The vulnerability was reserved and published in August 2025, indicating it is a recent discovery. The absence of affected version details beyond the specific firmware version implies the issue may be limited to this firmware release or closely related versions. The technical details do not specify whether authentication or user interaction is required, but given the router context and the function name, it is plausible that exploitation could be achieved remotely if the vulnerable function is exposed via the router's management interface or network services.

For European organizations, the impact of this vulnerability could be significant, especially for small and medium-sized enterprises (SMEs) and home office environments that utilize Tenda AC10 routers for network connectivity. Compromise of the router could lead to interception of sensitive communications, insertion of malicious payloads into network traffic, or lateral movement within the corporate network. This could result in data breaches, disruption of business operations, or exposure to further malware infections. Since routers serve as the network gateway, their compromise undermines perimeter security and can facilitate advanced persistent threats. Additionally, critical infrastructure sectors relying on these devices for connectivity could face operational disruptions. The absence of a patch increases the risk window, and the lack of known exploits does not preclude the possibility of targeted attacks, especially from sophisticated threat actors. The vulnerability's exploitation could also affect confidentiality, integrity, and availability of network services, with potential cascading effects on connected systems.

Organizations should immediately inventory their network infrastructure to identify the presence of Tenda AC10 v4.0 routers running firmware version 16.03.10.20. Until a vendor patch is available, it is recommended to restrict access to the router's management interfaces by implementing network segmentation and firewall rules that limit administrative access to trusted hosts only. Disabling remote management features and UPnP services can reduce the attack surface. Monitoring network traffic for unusual activity or signs of exploitation attempts is advised. If possible, replacing affected devices with models from vendors with robust security update practices should be considered. Organizations should also engage with Tenda support channels to obtain information on forthcoming patches or workarounds. Applying network-level protections such as intrusion detection/prevention systems (IDS/IPS) configured to detect anomalous router behavior can provide additional defense. Finally, educating users about the risks of using outdated firmware and enforcing regular firmware update policies will help mitigate similar vulnerabilities in the future.