Description

The affected Ebyte product does not provide separation between limited and administrative management functions. A low privileged authenticated attacker could access security sensitive configuration functions and modify settings that affect the confidentiality, integrity, or availability of the device.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.8",
  "pubDate": "2026-08-31T16:19:13.053Z",
  "pubdate": "2026-08-31T16:19:13.053Z",
  "executiveSummary": "The Ebyte product suffers from an improper authorization vulnerability stemming from a lack of functional separation between management roles. The device fails to enforce granular access control policies, allowing low-privileged authenticated users to access administrative management functions.\nThis vulnerability exposes the device to unauthorized configuration changes that can directly impact its confidentiality, integrity, and availability. By bypassing intended permission boundaries, an attacker can modify security-sensitive settings, potentially leading to unauthorized data access, service disruption, or the compromise of device integrity.\nThe risk is categorized as high because the vulnerability allows for privilege escalation from a low-privileged account to administrative control. Exploitation requires the attacker to have valid low-privileged credentials, after which they can interact with administrative interfaces or API endpoints that lack server-side access control enforcement. This flaw effectively negates the security benefit of maintaining distinct user roles within the system.",
  "technicalDetails": "The root cause of this vulnerability is a failure in the application's authorization mechanism, specifically the absence of a robust Access Control List (ACL) or role-based access control (RBAC) implementation governing administrative versus standard management interfaces. While the system authenticates the user, it fails to perform secondary authorization checks to ensure the user possesses the required privileges before executing sensitive management functions.\nIn a secure configuration, administrative functions should be gated by a distinct permission check that validates the user's role against the requested action. In the affected Ebyte product, the application logic assumes that any authenticated session is authorized to trigger sensitive backend functions, such as updating security configurations, modifying firewall rules, or altering system settings.\nThe exploitation flow proceeds as follows: First, the attacker authenticates using a valid, low-privileged user account. Once a session token is established, the attacker identifies the administrative function endpoints or hidden UI elements that are typically restricted from standard users. By sending crafted HTTP requests or direct function calls to these endpoints, the attacker bypasses the restricted client-side interface.\nBecause the backend performs no validation of the requester's privilege level, the application processes the command as an administrative action. An attacker can use this to disable logging, create new administrative accounts, or modify network parameters to facilitate man-in-the-middle (MITM) attacks or exfiltrate sensitive data. Since the application fails to distinguish between roles, the security impact is equivalent to an administrative takeover of the device.\nThe lack of privilege separation means that the entire management plane is exposed to anyone with entry-level access. The vulnerable component is the internal API handler or the controller responsible for verifying user permissions prior to committing configuration changes. There is no indication of complex binary exploitation requirements; the vulnerability is a logic error in the authorization layer, making it trivial for an authenticated attacker to perform unauthorized operations."
}