CVE-2026-78795 in B11
Summary
by MITRE • 10/09/2026
An issue in Netcore B11 Enterprise-level full Gigabit 9-port shop wireless router v1.3.241114.024540 and before allows a remote attacker to obtain sensitive information
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Analysis
by VulDB Data Team • 10/09/2026
The vulnerability identified in the Netcore B11 Enterprise-level full Gigabit 9-port shop wireless router, specifically affecting version 1.3.241114.024540 and earlier releases, represents a critical security flaw that enables remote attackers to extract sensitive information from the device. This class of vulnerability typically stems from improper access control mechanisms or insufficient validation of user privileges within the router's management interface or underlying firmware components. In many embedded networking devices, administrative functions are often exposed through web-based interfaces or API endpoints without adequate authentication checks for specific data retrieval operations. When these controls are misconfigured or absent, an unauthenticated remote attacker can interact with the system to query internal states, configuration files, or user credentials that should remain restricted to authorized administrators only.
From a technical perspective, this flaw aligns closely with CWE-200, which defines exposure of sensitive information to an unauthorized actor. The root cause often involves insecure direct object references (CWE-611) where the application fails to verify whether the requesting user has permission to access specific resources. For instance, if a router exposes endpoints that return system logs, connected client MAC addresses, or Wi-Fi passwords without requiring valid session tokens or proper role-based access control checks, any remote entity can exploit these paths. The attacker leverages standard HTTP requests or crafted API calls to retrieve this data over the network, bypassing intended security boundaries entirely. This is particularly dangerous in enterprise environments where such routers serve as gateways for sensitive corporate traffic and internal networks.
The operational impact of this vulnerability extends beyond simple data leakage. By obtaining sensitive information such as administrative credentials or pre-shared keys, an attacker can gain deeper access to the network infrastructure. This initial foothold often serves as a precursor to more severe attacks, including session hijacking, man-in-the-middle attacks, or complete compromise of the local area network. In an enterprise setting, the exposure of internal configuration details allows attackers to map out network topology and identify other vulnerable devices for lateral movement. Furthermore, if cryptographic keys or authentication tokens are exposed, it may lead to long-term persistence within the environment, as traditional perimeter defenses like firewalls become ineffective against insider-like threats originating from compromised gateway devices.
Mitigation strategies must focus on immediate patching and rigorous access control enforcement. The primary remediation is to upgrade the Netcore B11 router firmware to a version that addresses this specific flaw, ensuring that all known privilege escalation and information disclosure bugs are resolved by the vendor. In cases where updating is not immediately feasible, network segmentation should be implemented to isolate management interfaces from untrusted networks, restricting access to trusted IP ranges only. Additionally, administrators should enforce strong authentication policies, disable unused services such as UPnP or Telnet if present, and regularly audit user permissions within the router's configuration panel. Monitoring for unusual outbound traffic patterns related to data exfiltration can also help detect exploitation attempts in real-time.
This vulnerability is categorized under MITRE ATT&CK technique T1504, which covers weak or compromised credentials used for lateral movement, although it specifically manifests here as an initial information disclosure phase (T1005). The lack of proper input validation and access control reflects common pitfalls in IoT firmware development where security considerations are often secondary to functionality. Addressing these issues requires a shift toward secure coding practices that prioritize least privilege principles and comprehensive threat modeling during the design phase. Organizations relying on this hardware must treat such vulnerabilities as critical risks due to their potential to undermine overall network integrity and confidentiality.