CVE-2025-60569 is a buffer overflow vulnerability identified in the D-Link DIR600L Ax router firmware version FW116WWb01. The vulnerability resides in the formSetRoute function, where improper handling of the curTime parameter allows an attacker to overflow a buffer. This flaw is classified under CWE-121 (Stack-based Buffer Overflow), which typically enables attackers to overwrite memory, potentially causing crashes or arbitrary code execution. However, the CVSS vector indicates no impact on confidentiality or integrity but a high impact on availability (A:H), meaning exploitation leads primarily to denial of service (DoS). The attack vector is network-based (AV:N), requiring no privileges (PR:N) or user interaction (UI:N), making it remotely exploitable by unauthenticated attackers. The vulnerability was reserved on 2025-09-26 and published on 2025-10-24, with no patches currently available and no known exploits in the wild. The absence of patches necessitates immediate attention to mitigate risk. Given the router's role as a network gateway, successful exploitation can disrupt internet and intranet connectivity, affecting business operations and critical services.

For European organizations, this vulnerability poses a significant risk to network availability, especially for those relying on the D-Link DIR600L Ax router in their infrastructure. A successful exploit can cause router crashes or reboots, leading to denial of service and potential operational downtime. This can affect SMEs and enterprises alike, particularly those in sectors where continuous network connectivity is critical, such as finance, healthcare, and manufacturing. Disruptions could also impact remote work capabilities and cloud service access. Additionally, the lack of confidentiality and integrity impact reduces the risk of data breaches but does not diminish the operational impact. The threat is heightened in environments where network redundancy is limited or where this router is deployed at critical network junctures.

1. Monitor D-Link’s official channels for firmware updates addressing CVE-2025-60569 and apply patches immediately upon release. 2. Until patches are available, restrict access to the router’s management interface by implementing network segmentation and firewall rules to limit exposure to untrusted networks. 3. Disable remote management features if not required to reduce the attack surface. 4. Employ intrusion detection/prevention systems (IDS/IPS) to detect anomalous traffic patterns targeting the formSetRoute function or curTime parameter. 5. Conduct regular network device audits to identify the presence of vulnerable router models and plan for hardware replacement if necessary. 6. Educate IT staff on recognizing signs of router instability or DoS conditions that may indicate exploitation attempts. 7. Implement network redundancy and failover mechanisms to maintain availability in case of router failure.