Description

Ebyte gateway product's vendor configuration utility does not require authentication before allowing certain disruptive administrative actions when default credentials remain configured. An unauthenticated attacker on the adjacent network could reboot the device or restore factory settings, resulting in a loss of configuration and service availability.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.1",
  "pubDate": "2026-08-28T00:18:15.927Z",
  "pubdate": "2026-08-28T00:18:15.927Z",
  "executiveSummary": "This vulnerability involves a critical lack of authentication enforcement within the Ebyte gateway vendor configuration utility. The flaw enables unauthenticated actors on the adjacent network to perform high-impact administrative operations, specifically device rebooting and factory reset sequences, provided the device retains default credentials.\nThe vulnerability constitutes an Improper Authentication weakness. By bypassing the required authentication handshake, an attacker can trigger disruptive commands that compromise the availability and integrity of the gateway. The primary risk implication is a permanent loss of operational configuration and service downtime, facilitating a Denial of Service (DoS) condition.\nExploitation does not require elevated privileges or complex interaction, provided the attacker maintains network proximity to the affected device. Because the utility fails to validate the requester's identity before executing administrative primitives, the gateway is left in a state of continuous exposure to unauthorized control. This vulnerability highlights the significant security implications of relying on default configurations in industrial and network-connected hardware.",
  "technicalDetails": "The vulnerability is rooted in the design of the Ebyte gateway's administrative interface, which fails to gate sensitive management primitives behind a secure authentication mechanism during the initialization or configuration phase. When the device is operating with default credentials, the utility's underlying communication logic assumes an implicit trust model for any traffic received over the management interface.\nThe attack flow originates from an adversary positioned on the adjacent network segment capable of communicating with the gateway's management utility. By crafting specific, unauthorized command packets designed to trigger the device's internal administrative functions, the attacker bypasses the check-in process. Because the utility lacks an authentication challenge-response cycle for these specific functions, the gateway process executes the requested action without verifying the session's validity.\nSpecifically, the vulnerable component resides in the configuration utility's command parser. This parser accepts administrative requests—namely 'reboot' and 'factory reset'—as legitimate inputs regardless of the session state. Upon receiving a malformed or unauthorized command, the system calls internal routines responsible for system hardware resets. The lack of an access control list (ACL) or session-based authentication token verification allows these commands to be processed in the pre-authenticated state.\nThe exploitation method relies on the deterministic response of the gateway to these administrative commands. An attacker can use common network reconnaissance tools to identify the gateway, then replay or craft packets targeting the known command structure of the configuration utility. Once the command is parsed and accepted by the device, the firmware immediately triggers a hardware-level execution path for the reboot or factory reset, overriding any ongoing network communication.\nThe post-exploitation impact is severe: a factory reset results in the immediate wiping of all user-defined parameters, including network settings, security policies, and custom logic configurations. This forces the device into an inoperable state until manual reconfiguration is performed, effectively resulting in a persistent Denial of Service (DoS) and an operational outage for the affected gateway infrastructure."
}