Description

ZTE Z80 Ultra's system interfaces do not have robust invocation authentication, with inadequate access control. Third-party apps may call the interfaces through reflection and retrieve relevant information.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.5",
  "pubDate": "2026-10-10T10:16:44.087Z",
  "pubdate": "2026-10-10T10:16:44.087Z",
  "executiveSummary": "The ZTE Z80 Ultra system interfaces suffer from an Improper Access Control vulnerability characterized by a lack of robust invocation authentication. This security flaw enables unauthorized third-party applications to bypass intended security boundaries and directly interact with protected system interfaces. By leveraging reflection techniques, malicious applications can invoke these restricted interfaces to retrieve sensitive system information or perform unauthorized operations.\nThe vulnerability represents a significant risk to the confidentiality and integrity of the device, as it allows non-privileged applications to escalate their effective capabilities without explicit user or system authorization. The impact includes unauthorized data exfiltration, information disclosure, and potential disruption of system-level services. Exploitation does not require elevated privileges or complex network-based vectors, as the vulnerability is inherent to the local inter-process communication mechanism. Attackers can leverage this flaw by deploying malicious applications that perform dynamic runtime inspection to identify and access sensitive system methods, effectively bypassing the security controls that should restrict inter-app communication and internal API exposure.",
  "technicalDetails": "The root cause of this vulnerability lies in the insufficient enforcement of authentication and authorization checks within the ZTE Z80 Ultra's system framework. The interfaces responsible for sensitive operations or data retrieval fail to validate the calling context of the requesting application, allowing requests originating from untrusted, third-party code to succeed.\nThe exploitation mechanism relies on the Java/Android reflection API, which allows a program to inspect classes, methods, and fields at runtime and invoke them dynamically. An attacker can craft a malicious application that utilizes these reflection capabilities to bypass standard compile-time access modifiers and call protected system methods that lack internal authentication logic. Since the system interfaces do not implement proper permission checks or caller identity verification (e.g., checking the calling application's signature or UID), the system treats these reflected calls as legitimate internal requests.\nThe attack flow follows a structured pattern: First, the attacker installs a malicious application on the ZTE Z80 Ultra. Second, the application identifies the target system interface via reflection or by identifying exported, unprotected service methods. Third, the application invokes the target method, passing necessary parameters or receiving sensitive return values. Because the system interface performs no validation, it executes the command or returns the requested data directly to the malicious application.\nThis vulnerability is particularly dangerous because it bypasses the standard Android permission model. Even if an application has not been granted specific permissions by the user, the lack of authentication within the target interface allows the application to perform actions that are otherwise restricted. The lack of robust caller validation makes it impossible for the system to discern between authorized core services and malicious third-party code. The resulting post-exploitation impact includes the ability for an attacker to harvest sensitive system state, configuration data, or private user information, potentially leading to a total compromise of user privacy or a platform for further exploitation of other system components. The absence of strict interface encapsulation allows for significant privilege escalation, as the malicious application can operate with the effective authority of the system services it invokes."
}