CVE-2022-41484 is a high-severity buffer overflow vulnerability identified in the Tenda AC1900 AP500(US)_V1_180320(Beta) wireless access point device. The vulnerability exists in an unspecified function located at memory address 0x32384 within the device's firmware. A buffer overflow occurs when a program writes more data to a buffer than it can hold, which can corrupt adjacent memory. In this case, the overflow can be triggered remotely by sending a crafted request to the device, without requiring any authentication or user interaction. The consequence of this buffer overflow is a Denial of Service (DoS) condition, meaning the device can crash or become unresponsive, disrupting network connectivity. The CVSS 3.1 base score is 7.5, reflecting a high severity due to the network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), no impact on confidentiality or integrity (C:N, I:N), but a high impact on availability (A:H). The vulnerability is classified under CWE-120 (Classic Buffer Overflow). No patches or fixes have been linked or published at the time of this report, and there are no known exploits in the wild. The affected product is a specific Tenda access point model and firmware version, which is used to provide wireless network access in small office or home environments. Exploiting this vulnerability would allow an attacker to disrupt wireless network availability by crashing the device remotely, potentially causing network outages or loss of connectivity for users relying on this access point.

For European organizations, especially small and medium enterprises or home office users deploying the Tenda AC1900 AP500 access point, this vulnerability poses a significant risk to network availability. A successful attack could lead to denial of wireless service, interrupting business operations, remote work, or critical communications. While the vulnerability does not compromise data confidentiality or integrity, the loss of availability can impact productivity and cause operational disruptions. In sectors where continuous network access is critical, such as healthcare, finance, or public services, even temporary outages can have cascading effects. Additionally, the ease of exploitation without authentication or user interaction increases the threat level, as attackers can remotely target vulnerable devices over the internet or local networks. Given the lack of available patches, affected organizations may face prolonged exposure until a firmware update is released and deployed. This vulnerability also raises concerns about the security posture of IoT and networking devices widely used in European homes and businesses, emphasizing the need for vigilant device management and network segmentation.

1. Immediate mitigation should focus on network-level controls: restrict external access to the vulnerable Tenda AP500 devices by implementing firewall rules that block unsolicited inbound traffic to the device's management interfaces and service ports. 2. Segment the network to isolate the access point from critical systems, limiting the impact of potential DoS attacks. 3. Monitor network traffic for unusual or malformed requests targeting the access point, which could indicate exploitation attempts. 4. Contact Tenda support or check official channels regularly for firmware updates or patches addressing CVE-2022-41484, and apply them promptly once available. 5. If feasible, consider replacing the affected device with a more secure and actively supported access point model to reduce exposure. 6. Educate IT staff and users about the risks of using outdated or beta firmware versions and encourage regular device inventory and security assessments. 7. Employ network redundancy where possible, such as backup wireless access points or failover internet connections, to maintain availability during an attack or device failure.