CVE-2025-44893 is a stack overflow vulnerability identified in the FW-WGS-804HPT device firmware version 1.305b241111. The flaw resides in the web_acl_mgmt_Rules_Apply_post function, specifically through improper handling of the ruleNamekey parameter. A stack overflow occurs when this parameter is manipulated with crafted input, leading to memory corruption. This vulnerability is classified under CWE-121 (Stack-based Buffer Overflow), which can allow attackers to overwrite the call stack, potentially enabling arbitrary code execution. The vulnerability is remotely exploitable over the network without requiring authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). The impact includes full compromise of confidentiality, integrity, and availability of the affected device, as attackers can execute arbitrary code with system-level privileges. Although no patches or vendor advisories are currently available, the critical CVSS score of 9.8 underscores the urgency of addressing this issue. No known exploits have been reported in the wild yet, but the ease of exploitation and severity make it a high-risk vulnerability. The affected product appears to be a network device or firewall appliance, which often plays a critical role in network security and traffic management.

For European organizations, exploitation of CVE-2025-44893 could lead to complete compromise of affected network devices, resulting in unauthorized access, data breaches, disruption of network services, and potential lateral movement within corporate networks. Given that FW-WGS-804HPT likely functions as a firewall or gateway device, successful exploitation could undermine perimeter defenses, exposing internal systems to further attacks. This could affect confidentiality of sensitive data, integrity of network traffic rules, and availability of critical network services. Organizations in sectors such as finance, government, telecommunications, and critical infrastructure are particularly at risk due to the strategic importance of network security devices. Additionally, the lack of authentication and user interaction requirements increases the likelihood of automated exploitation attempts, raising the threat level for European entities relying on this product.

1. Immediately isolate affected FW-WGS-804HPT devices from untrusted networks to limit exposure. 2. Implement strict network segmentation to restrict access to management interfaces, especially the web_acl_mgmt endpoint. 3. Deploy Web Application Firewalls (WAFs) or Intrusion Prevention Systems (IPS) with custom rules to detect and block anomalous requests targeting the ruleNamekey parameter. 4. Conduct thorough input validation and sanitization on all user-supplied data at the application layer if possible. 5. Monitor network traffic and device logs for unusual activity or repeated attempts to access the vulnerable function. 6. Engage with the device vendor or community to obtain patches or firmware updates as soon as they become available. 7. Develop and test incident response plans specifically for network device compromise scenarios. 8. Consider temporary replacement or removal of vulnerable devices from critical network paths until patched. 9. Educate network administrators about the vulnerability and signs of exploitation attempts. 10. Regularly audit device configurations and access controls to minimize attack surface.