Alpine iLX-F511 'diagapp' Vulnerability Allows Code Execution by Physically Present Attackers
A command injection vulnerability in the Alpine iLX-F511 infotainment system's diagapp component allows physically present attackers to execute arbitrary code with root privileges.
The Zero Day Initiative (ZDI) has disclosed a critical command injection vulnerability affecting the Alpine iLX-F511 infotainment system. Identified as ZDI-26-825, this flaw resides within the 'diagapp' component and allows attackers with physical access to the device to execute arbitrary code with the highest level of privileges.
The vulnerability stems from a failure to properly validate user-supplied input before it is used in a system call. This oversight enables an attacker to inject malicious commands that the system then executes, effectively granting them control over the device. The exploit requires no authentication, making it accessible to anyone who can physically interact with the infotainment unit.
With a CVSS score of 6.8, this vulnerability is rated as 'High' severity. While it requires physical presence, the potential for code execution with root privileges on a vehicle's infotainment system is significant. Such access could lead to various malicious activities, including data theft, system manipulation, or potentially even interference with vehicle functions, depending on the system's architecture and connectivity.
The disclosure timeline indicates a lengthy process between the initial report and public release. ZDI first reported the vulnerability to Alpine on February 5, 2026. The vendor acknowledged the report and requested an extension, followed by ZDI's inquiry on July 21, 2026, regarding the fix status. ZDI ultimately notified Alpine of their intention to publish the advisory as a zero-day on October 15, 2026, leading to the coordinated public release on October 28, 2026.
Researchers Inhyung Lee, Seokhun Lee, Chulhan Park, Wooseok Kim, and Yeonseok Jang, collectively known as Team MAMMOTH, are credited with discovering and reporting this vulnerability. Their work highlights the ongoing security challenges in automotive infotainment systems, which are increasingly complex and connected.
Given the nature of the vulnerability, which requires physical access, the primary mitigation strategy recommended by ZDI is to restrict physical interaction with the affected Alpine iLX-F511 devices. This underscores the importance of physical security measures in preventing exploitation, especially in shared or public environments.
This discovery adds to a growing list of vulnerabilities found in automotive infotainment systems, emphasizing the need for manufacturers to prioritize robust security practices throughout the development lifecycle. As these systems become more integrated with vehicle functions and personal data, the impact of such flaws becomes increasingly critical.