CVE-2025-60334 identifies a stack overflow vulnerability in the TOTOLINK N600R router firmware version 4.3.0cu.7866_B20220506. The vulnerability resides in the setWiFiBasicConfig function, which processes the ssid parameter. A stack overflow occurs when the input exceeds the buffer size allocated on the stack, leading to memory corruption. This can cause the device to crash or reboot unexpectedly, resulting in a Denial of Service (DoS). The vulnerability does not require authentication, meaning an attacker only needs network access to the device to exploit it. No known exploits have been reported in the wild, and no patches have been released yet. The lack of a CVSS score suggests the vulnerability is newly disclosed and pending further analysis. The impact is primarily on availability, as the device becomes unresponsive or restarts, disrupting network connectivity. The vulnerability is significant because routers like the TOTOLINK N600R are often used in small to medium-sized business and home environments, where disruption can affect productivity and communications. The absence of authentication requirements and the possibility of remote exploitation increase the risk profile. Organizations relying on these devices should be vigilant and prepare to apply vendor updates once available.

For European organizations, exploitation of this vulnerability could lead to network outages due to router crashes or reboots, impacting business continuity and communications. Small and medium enterprises (SMEs) and home office setups using TOTOLINK N600R routers are particularly vulnerable, as these devices often lack advanced security controls. Critical infrastructure or service providers using these routers could face service disruptions, potentially affecting customers and operational processes. The DoS condition could be leveraged as part of a broader attack to degrade network availability or as a distraction while other attacks are conducted. Since the vulnerability does not require authentication, attackers could exploit exposed management interfaces or compromised internal networks. The lack of patches increases the window of exposure, and the absence of known exploits suggests that proactive mitigation is crucial. Overall, the impact is primarily on availability, but indirect effects on integrity and confidentiality could arise if attackers use the DoS as a stepping stone for further attacks.

1. Immediately restrict access to the router’s management interface by limiting it to trusted IP addresses or disabling remote management if not needed. 2. Segment networks to isolate vulnerable devices from critical infrastructure and sensitive data. 3. Monitor network traffic for unusual or malformed packets targeting the ssid parameter or management functions. 4. Implement network-level protections such as firewalls or intrusion prevention systems (IPS) to detect and block exploitation attempts. 5. Regularly audit and inventory network devices to identify the presence of TOTOLINK N600R routers and assess their firmware versions. 6. Engage with the vendor for firmware updates and apply patches promptly once released. 7. Educate IT staff about this vulnerability to ensure rapid response to any signs of exploitation. 8. Consider temporary replacement or upgrade of vulnerable devices in high-risk environments until a patch is available.