CVE-2025-50613 is a buffer overflow vulnerability identified in the Netis WF2880 router firmware version 2.1.40207, specifically within the FUN_00475e1c function of the cgitest.cgi file. The vulnerability arises when an attacker manipulates the 'wds_key_wep' parameter in a crafted payload, leading to a buffer overflow condition. This overflow can cause the affected program to crash, resulting in a Denial of Service (DoS) condition. The vulnerability does not currently have an associated CVSS score, nor are there known exploits in the wild. The buffer overflow occurs due to improper bounds checking on input data, which allows an attacker to overwrite memory regions, destabilizing the router's web interface process. While the primary impact is a DoS attack, the potential exists for more severe exploitation if the overflow can be leveraged to execute arbitrary code, although this has not been confirmed. The vulnerability affects a specific router model and firmware version, and the attack vector requires sending a specially crafted HTTP request targeting the vulnerable CGI script. No authentication or user interaction is required to trigger the vulnerability, increasing the risk of exploitation in exposed devices.

For European organizations, the impact of CVE-2025-50613 primarily involves service disruption due to Denial of Service attacks on network infrastructure. The Netis WF2880 router is a consumer and small office/home office (SOHO) device, so organizations using these routers in branch offices or remote locations could experience network outages, affecting connectivity and productivity. Disruption of network services can also impact critical business operations, especially in sectors relying on continuous internet access. Although no code execution exploits are currently known, the buffer overflow nature of the vulnerability suggests a potential risk for future escalation, which could compromise confidentiality and integrity if exploited. Additionally, compromised routers could be leveraged as entry points or for lateral movement in a network. The lack of authentication requirement means attackers can exploit the vulnerability remotely if the device's management interface is exposed to untrusted networks, which is a common misconfiguration. European organizations with limited IT security resources or outdated device inventories are particularly vulnerable to such attacks.

To mitigate CVE-2025-50613, organizations should first identify all Netis WF2880 routers in their environment and verify firmware versions. Since no official patches or updates are currently linked, immediate mitigation includes restricting access to the router's management interface by implementing network segmentation and firewall rules to block external HTTP requests to the cgitest.cgi endpoint. Disabling remote management features or restricting them to trusted IP addresses can reduce exposure. Network monitoring should be enhanced to detect unusual HTTP requests targeting the vulnerable CGI script. Organizations should also consider replacing affected devices with models from vendors that provide timely security updates. In the absence of patches, applying intrusion prevention system (IPS) rules to detect and block exploit attempts targeting the 'wds_key_wep' parameter can provide additional protection. Regularly reviewing device configurations and ensuring firmware is updated when patches become available is critical. Finally, educating IT staff about this vulnerability and encouraging proactive vulnerability management will help reduce risk.