CVE-2026-75813 in NE2-D11
Summary
by MITRE • 08/28/2026
Certain configuration endpoints may lack proper server-side authorization checks, allowing unauthorized users to access or modify sensitive device settings. This could result in full compromise of device functionality.
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Analysis
by VulDB Data Team • 08/28/2026
The vulnerability described represents a critical failure in the implementation of Access Control mechanisms within web-based management interfaces for network devices. Specifically, this is an instance of Broken Access Control where server-side authorization checks are either missing or improperly implemented on specific configuration endpoints. In secure application design, every request to modify sensitive state must be validated against the current user's permissions and authentication status by the backend service itself, rather than relying solely on client-side controls such as hiding buttons in a graphical interface. The absence of these server-side validations allows any authenticated user, or potentially unauthenticated users if session management is also flawed, to bypass intended restrictions and interact directly with API endpoints that should be restricted to administrators or specific roles. This flaw fundamentally undermines the principle of least privilege, which dictates that users should only have access to resources necessary for their function.
From a technical perspective, this vulnerability typically manifests when developers rely on client-side logic to enforce security boundaries. For example, an interface might disable configuration options for non-administrative users in the browser view, but fail to verify these permissions before processing POST or PUT requests sent to the backend server. An attacker can exploit this by crafting custom HTTP requests using tools like curl or Burp Suite, directly targeting endpoints such as /api/system/config or similar paths that handle device settings. Since the server does not validate whether the session token associated with the request belongs to a user with sufficient privileges, it accepts and executes the modification commands. This creates a direct path for privilege escalation if lower-privileged accounts exist on the system, allowing them to perform actions reserved exclusively for high-level administrators.
The operational impact of this vulnerability is severe and potentially catastrophic for network integrity. By gaining unauthorized access to sensitive device settings, an attacker can alter fundamental configurations that govern connectivity, security policies, and logging mechanisms. This could include disabling firewall rules, changing DNS server addresses to redirect traffic through malicious infrastructure, modifying routing tables to facilitate man-in-the-middle attacks, or turning off audit logs to cover tracks of further intrusion. In the context of Internet of Things (IoT) devices or industrial control systems, this level of access can lead to physical consequences, such as disrupting critical services or causing hardware damage if configuration parameters related to power management or operational limits are tampered with. The phrase full compromise of device functionality indicates that the attacker gains complete control over the target system's behavior, effectively neutralizing its intended purpose and security posture.
This vulnerability aligns closely with CWE-284 Improper Access Control and CWE-862 Missing Authorization in OWASP Top 10 classifications. It also maps to specific techniques within the MITRE ATT&CK framework, particularly T1078 Valid Accounts if exploitation relies on stolen credentials of low-privileged users, or T1548 Abuse Elevation Control Mechanism if it involves escalating privileges from a standard user account to an administrator role. The lack of server-side validation is a common root cause in many high-severity CVEs affecting embedded systems and web applications alike, highlighting the necessity for rigorous input validation and strict enforcement of access policies on the backend.
Mitigation strategies must focus on implementing robust server-side authorization checks for all configuration endpoints. Developers should ensure that every API request verifies the user's role and permissions against a secure session store before processing any state-changing operations. Implementing Role-Based Access Control (RBAC) or Attribute-Based Access Control (ABAC) models can help enforce these policies systematically. Additionally, adopting defense-in-depth principles is crucial; this includes using Web Application Firewalls to detect anomalous request patterns, implementing strict Content Security Policies, and ensuring that session tokens are securely managed with appropriate expiration times and binding mechanisms. Regular security testing, including automated vulnerability scanning and manual penetration testing focused on access control flaws, should be integrated into the software development lifecycle to identify and remediate such gaps before deployment.