CVE-2025-60552 is a buffer overflow vulnerability identified in the D-Link DIR600L Ax router firmware version FW116WWb01. The flaw exists in the formTcpipSetup function, specifically through improper handling of the curTime parameter. Buffer overflow vulnerabilities occur when input data exceeds the allocated buffer size, potentially overwriting adjacent memory and enabling arbitrary code execution or system crashes. In this case, an attacker can exploit the vulnerability by sending a crafted request targeting the TCP/IP setup interface of the router. Successful exploitation could allow remote code execution or denial of service, compromising the router's integrity and availability. The vulnerability was reserved on September 26, 2025, and published on October 24, 2025, but no CVSS score or patches have been provided yet. No known exploits are currently in the wild, indicating limited immediate threat but a potential risk if weaponized. The affected device is a widely used consumer-grade router, often deployed in home and small office environments, which may lack advanced security controls. The absence of authentication requirements or user interaction details is unclear, but network access to the router's management interface is likely necessary. This vulnerability highlights the risks associated with embedded device firmware flaws, which can serve as entry points for attackers to infiltrate internal networks or disrupt connectivity.

For European organizations, especially small and medium enterprises (SMEs) and home office users relying on the D-Link DIR600L Ax router, exploitation of this vulnerability could lead to unauthorized remote code execution, enabling attackers to control the device, intercept or manipulate network traffic, or launch further attacks within the internal network. The buffer overflow could also cause denial of service, disrupting internet connectivity and business operations. Confidentiality could be compromised if attackers gain access to sensitive data traversing the router. Integrity and availability of network services could be severely impacted, potentially leading to operational downtime. Given the router's role as a network gateway, successful exploitation could facilitate lateral movement or persistent access. The lack of known exploits currently reduces immediate risk, but the vulnerability's presence in consumer-grade equipment widely deployed across Europe elevates the potential impact if exploited. Organizations with limited IT security resources may be particularly vulnerable due to insufficient device monitoring and patch management.

1. Inventory and identify all D-Link DIR600L Ax routers running firmware FW116WWb01 within the network environment. 2. Restrict access to router management interfaces by limiting IP ranges allowed to connect and disabling remote management where possible. 3. Implement network segmentation to isolate vulnerable devices from critical infrastructure and sensitive data. 4. Monitor network traffic for unusual activity targeting the TCP/IP setup interface or attempts to exploit buffer overflow conditions. 5. Apply strict firewall rules to block unauthorized inbound connections to router management ports. 6. Engage with D-Link support channels to obtain information on forthcoming patches or firmware updates addressing this vulnerability. 7. If feasible, consider replacing affected routers with models that have received security updates or have a better security track record. 8. Educate users on the risks of exposing router management interfaces and encourage strong administrative passwords. 9. Regularly review and update network device configurations to minimize attack surface. 10. Prepare incident response plans to quickly isolate and remediate compromised devices.