CVE-2026-13103 in App Store
Summary
by MITRE • 07/16/2026
A potential path traversal vulnerability was reported in Lenovo App Store, distributed exclusively in the Chinese market, that could allow a local authenticated user to execute arbitrary code.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 07/16/2026
This vulnerability represents a critical path traversal flaw that exists within Lenovo's proprietary App Store application, which is specifically distributed within the Chinese market. The issue stems from inadequate input validation and improper handling of file paths during application installation and execution processes. A local authenticated user who has already gained access to the system can exploit this weakness to manipulate file system operations and potentially execute arbitrary code with elevated privileges.
The technical implementation of this vulnerability likely involves insufficient sanitization of user-supplied input or file path parameters within the App Store's installation routines. When the application processes package installations or updates, it may directly incorporate user-provided paths without proper validation, allowing attackers to manipulate directory traversal sequences such as "../" or similar patterns. This flaw aligns with CWE-22 Path Traversal vulnerabilities which specifically address improper input handling that allows access to restricted directories and files.
From an operational perspective, this vulnerability presents a significant risk to Lenovo's Chinese market ecosystem since it requires only local authentication to exploit. The attack surface is limited to systems where the App Store is installed and where users have already established authenticated sessions. However, the impact extends beyond simple code execution as the attacker could potentially modify system files, install malicious applications, or access sensitive user data stored within the application's operational context.
The potential exploitation pathway demonstrates characteristics consistent with ATT&CK technique T1059 Command and Scripting Interpreter, where adversaries leverage legitimate system tools to execute malicious code. Attackers could craft specially formatted application packages that, when installed through the vulnerable App Store, trigger the path traversal mechanism to overwrite critical system files or install backdoors. This vulnerability also intersects with ATT&CK tactic TA0004 Privilege Escalation, as successful exploitation would likely result in elevated privileges within the local system context.
Mitigation strategies should focus on implementing robust input validation and sanitization mechanisms within the App Store's file handling routines. The application must enforce strict path validation that rejects any input containing traversal sequences or attempts to access restricted directories. Additionally, privilege separation should be implemented so that installation processes run with minimal necessary permissions, following the principle of least privilege. Regular security audits and code reviews should specifically target file system operation handling within the application ecosystem to identify similar vulnerabilities.
Organizations should also consider implementing application whitelisting policies and monitoring for unusual file system modifications that might indicate exploitation attempts. The vulnerability highlights the importance of secure coding practices in proprietary applications, particularly those handling user-supplied content or installation packages. Regular security updates and patches should be deployed immediately upon resolution of the underlying path traversal flaw, while comprehensive testing should validate that all file operations properly sanitize input parameters before processing.