CVE-2025-63363 identifies a security vulnerability in the Waveshare RS232/485 TO WIFI ETH (B) Serial to Ethernet/Wi-Fi Gateway, specifically in Firmware version 3.1.1.0 (HW 4.3.2.1) and Webpage version V7.04T.07.002880.0301. The core issue is the absence of Management Frame Protection (MFP), a security feature designed to authenticate and encrypt management frames in Wi-Fi networks. Without MFP, attackers can craft and broadcast deauthentication and disassociation frames without any form of authentication or encryption. This allows them to forcibly disconnect legitimate clients from the wireless network, causing denial of service conditions. The vulnerability exploits the fundamental weakness in the device’s handling of Wi-Fi management frames, which are typically trusted and unauthenticated in legacy or unprotected implementations. Although no exploits have been reported in the wild, the attack vector is straightforward and can be executed with readily available wireless tools. The affected device is commonly used as a serial-to-Ethernet/Wi-Fi gateway, often deployed in industrial control systems, IoT environments, and remote monitoring setups. The lack of MFP exposes these critical communication links to disruption, potentially impacting operational continuity. No CVSS score has been assigned yet, and no patches or updates are currently linked to this vulnerability. The vulnerability’s exploitation does not require user interaction or authentication, increasing its risk profile.

For European organizations, the primary impact of CVE-2025-63363 is on the availability and reliability of wireless communications facilitated by the affected Waveshare gateways. Industries relying on these devices for remote monitoring, industrial automation, or IoT connectivity could experience service interruptions due to forced disconnections caused by deauthentication attacks. This can lead to operational downtime, loss of data transmission, and potential safety risks in critical infrastructure sectors such as manufacturing, energy, and transportation. The disruption of wireless links may also affect real-time control systems and monitoring dashboards, impacting decision-making and response times. Additionally, repeated or sustained attacks could degrade trust in wireless network stability, prompting costly network redesigns or increased security investments. While confidentiality and integrity are less directly impacted, the availability degradation alone can have significant financial and operational consequences. The lack of known exploits in the wild currently limits immediate risk, but the ease of attack execution means that motivated adversaries could leverage this vulnerability in targeted campaigns, especially in environments where these devices are prevalent.

To mitigate CVE-2025-63363, organizations should first verify if firmware updates or patches from Waveshare are available that implement Management Frame Protection or equivalent security enhancements. If no official patches exist, consider isolating the affected devices on segmented networks with strict access controls to limit exposure. Deploy wireless intrusion detection and prevention systems (WIDS/WIPS) capable of detecting and blocking forged deauthentication and disassociation frames. Network administrators should enforce strong Wi-Fi security protocols such as WPA3, which includes mandatory MFP, on all wireless infrastructure to reduce attack surface. Additionally, consider replacing vulnerable devices with models that support MFP or have robust security features. Regularly monitor wireless network logs for unusual disconnection patterns indicative of deauthentication attacks. Implement redundancy in critical communication paths to maintain operational continuity during attacks. Finally, educate security teams about this vulnerability and incorporate it into incident response plans to ensure rapid detection and mitigation if exploitation attempts occur.