CVE-2025-43988 is a security vulnerability affecting KuWFi 5G01-X55 FL2020_V0.0.12 devices. The vulnerability arises from an unauthenticated API endpoint named ajax_get.cgi, which is exposed on these devices. This endpoint allows remote attackers to access sensitive configuration data without any authentication or authorization checks. Among the data exposed are administrative credentials, which could enable attackers to gain full control over the affected device. The lack of authentication on this API endpoint represents a critical security flaw because it bypasses normal access controls, allowing attackers to retrieve sensitive information remotely. Although no specific affected versions are listed beyond the FL2020_V0.0.12 firmware version, the vulnerability appears to be tied to this particular firmware or device model. No patches or fixes have been published yet, and there are no known exploits in the wild at the time of this report. The vulnerability was reserved in April 2025 and published in August 2025, indicating recent discovery. The absence of a CVSS score requires an independent severity assessment based on the nature of the vulnerability and its potential impact. Given that administrative credentials can be extracted remotely without authentication, this vulnerability poses a significant risk to the confidentiality and integrity of affected devices and networks. Attackers leveraging this flaw could compromise the device, pivot into internal networks, or disrupt services by modifying configurations.

For European organizations, the impact of this vulnerability could be substantial, especially for those relying on KuWFi 5G01-X55 devices for network connectivity or infrastructure. Exposure of administrative credentials can lead to unauthorized device takeover, enabling attackers to alter network configurations, intercept or redirect traffic, or launch further attacks within the organization's network. This could result in data breaches, service disruptions, and loss of trust. Critical infrastructure providers, enterprises, and service providers using these devices may face operational downtime and regulatory consequences under GDPR if personal data is compromised. The vulnerability's unauthenticated nature means attackers do not need prior access or credentials, increasing the risk of widespread exploitation. Although no exploits are currently known in the wild, the ease of exploitation and sensitive data exposure make this a high-risk vulnerability that could be targeted by cybercriminals or state-sponsored actors aiming to disrupt European networks or steal sensitive information.

To mitigate this vulnerability, organizations should immediately identify any KuWFi 5G01-X55 devices running the FL2020_V0.0.12 firmware within their networks. Since no official patches are currently available, the following steps are recommended: 1) Isolate affected devices from untrusted networks, especially the internet, to prevent remote exploitation. 2) Restrict network access to the devices by implementing firewall rules that limit access to trusted management IPs only. 3) Monitor network traffic for unusual requests to the ajax_get.cgi endpoint and log any suspicious activity. 4) Change default administrative credentials on affected devices to strong, unique passwords to reduce risk if partial access is gained. 5) Engage with the vendor to obtain firmware updates or patches as soon as they become available. 6) Consider replacing vulnerable devices with more secure alternatives if immediate patching is not feasible. 7) Implement network segmentation to limit the impact of a compromised device. 8) Conduct regular security audits and vulnerability scans to detect similar issues proactively.