CVE-2026-58378 in H616
Summary
by MITRE • 07/09/2026
Allwinner H616 TV Box TV98 has ADB enabled and exposed to the network on production. An attacker could request for ADB authorization and gain root level privileges if the victim allows access.
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Analysis
by VulDB Data Team • 07/09/2026
The Allwinner H616 TV box running TV98 firmware presents a critical security vulnerability through the unauthorized exposure of Android Debug Bridge (ADB) functionality to network-accessible interfaces. This configuration fundamentally undermines the device's security posture by creating an attack vector that bypasses normal authentication mechanisms and provides direct administrative access to the underlying operating system. The vulnerability stems from the default configuration where ADB remains enabled in production environments, exposing a well-known debugging interface that should only be accessible through secure local connections. When ADB is exposed network-wide without proper authentication mechanisms, it creates an immediate privilege escalation path for any attacker who can reach the device's network interface.
The technical flaw represents a fundamental failure in secure configuration management and default security settings within embedded IoT devices. ADB service typically requires explicit authorization from the user when accessed remotely, but in this case, the system lacks proper access controls or network segmentation that would prevent unauthorized network-based access to the debugging interface. This misconfiguration allows an attacker to establish an ADB connection directly to the device and request authorization, effectively bypassing normal authentication procedures. The vulnerability aligns with CWE-668, which addresses "Exposure of Resource to Wrong Sphere" where a resource is made accessible to entities that should not have access. The attack surface extends beyond simple network exposure since ADB provides full system-level access including file system manipulation, application installation, and system configuration changes.
The operational impact of this vulnerability is severe as it enables complete system compromise without requiring specialized knowledge or expensive attack tools. An attacker with network access to the device can gain root privileges simply by requesting authorization through the exposed ADB interface, making this vulnerability particularly dangerous in environments where devices are deployed without proper network segmentation or security monitoring. The implications extend beyond individual device compromise to potential network-wide infiltration if multiple devices share the same network infrastructure. This vulnerability directly maps to ATT&CK technique T1059.001 for command and scripting interpreter and T1068 for exploit for privilege escalation, as attackers can leverage the exposed ADB service to execute arbitrary commands with system-level privileges. The lack of proper network boundary controls means that even devices intended for public or semi-public access become vulnerable to exploitation.
Mitigation strategies must address both immediate remediation and long-term security architecture improvements. The primary recommendation involves disabling ADB functionality in production environments or implementing strict network access controls that limit ADB access to trusted IP addresses only. Network segmentation should be enforced through firewall rules or VLAN configurations that prevent unauthorized access to devices running ADB services. Additionally, the firmware should be updated to include proper authentication mechanisms and ensure ADB is disabled by default in production builds. Security monitoring should be implemented to detect unusual network activity patterns that might indicate exploitation attempts against exposed ADB interfaces. Organizations should also consider implementing device integrity checks and regular security audits to identify similar misconfigurations across their deployed IoT infrastructure, as this vulnerability type demonstrates common issues found in embedded systems development where security is often an afterthought rather than a design principle.