A stack overflow vulnerability in Tenda AX-1806 devices permits unauthenticated remote attackers to trigger a denial of service condition.

This is a stack-based buffer overflow occurring within the deviceList parameter of the formSetWifiMacFilterCfg function. The vulnerability is exploitable by unauthenticated remote attackers over the network.

The exploitation of this vulnerability results in a denial of service, which renders the network device unresponsive and disrupts connectivity for all users reliant on the affected hardware. Given the CVSS score of 7.5, this high-severity flaw poses a significant operational risk to business continuity, particularly in environments where uptime is critical. An attacker can trigger this state remotely without any prior authentication, making it a viable target for disruptive attacks.

Immediate Action: Since no official patch is currently available, administrators should restrict management interface access to trusted internal networks only.

Proactive Monitoring: Monitor device logs for unusual traffic patterns or repeated requests directed at the WiFi configuration interface that may indicate probing for this overflow.

Compensating Controls: Deploy a firewall rule or Intrusion Prevention System (IPS) signature designed to inspect and drop malformed requests containing oversized payloads in the deviceList parameter.

Public Exploit Available: Yes — a published proof-of-concept exists, attributed to the research write-up referenced in the CVE record.

Due to the remote and unauthenticated nature of this vulnerability, Tenda AX-1806 users should prioritize limiting the exposure of the administrative interface to the public internet. While a vendor patch is pending, applying network-level segmentation or access control lists is necessary to mitigate the risk of remote denial of service attacks. Monitor vendor channels closely for the release of a firmware update that addresses the stack overflow.