CVE-2026-107055 in AppML
Summary
by MITRE • 10/29/2026
Insecure permissions in the autosave component of AppML neutriNote CE versionCode 1387 allows unauthorized attackers to write arbitrary files.
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Analysis
by VulDB Data Team • 10/29/2026
The vulnerability identified within the autosave functionality of AppML neutriNote Community Edition, specifically at version code 1387, represents a critical failure in file system access control mechanisms. This flaw stems from an insecure configuration where the application grants overly permissive write privileges to its internal components without adequate validation or restriction based on user context. In mobile and desktop environments, applications often utilize local storage for temporary files such as autosaves to ensure data persistence during unexpected crashes or interruptions. However, when these directories are configured with world-writable permissions or lack proper isolation from other application processes, they become attractive targets for exploitation by malicious actors operating within the same security context.
From a technical perspective, this issue is classified under CWE-732 as Incorrect Permission Assignment for Critical Resource. The autosave component likely writes temporary data to a directory that does not enforce strict access controls, allowing any process or user with read and write access to the application's sandboxed environment to manipulate these files. An attacker who has gained local execution capabilities on the device can exploit this misconfiguration by writing arbitrary content into the designated autosave location. Because many applications subsequently load or parse these temporary files during normal operation or recovery processes, an injected payload within a maliciously crafted file could be executed when the application attempts to restore data from the autosave state.
The operational impact of this vulnerability is significant as it facilitates unauthorized code execution and potential privilege escalation depending on the privileges held by the target process. By writing arbitrary files, an attacker can overwrite legitimate configuration files, inject malicious scripts into documents that are later opened or processed, or manipulate internal application states to cause denial of service conditions. In scenarios where the application runs with elevated system permissions, this flaw could allow a low-privileged user to execute commands as a higher-privileged account, effectively compromising the integrity and confidentiality of the entire system. This aligns with ATT&CK technique T1059 Command and Scripting Interpreter if the written files are scripts intended for execution, or T1224 File Discovery combined with T1078 Valid Accounts if used to escalate privileges within a multi-user environment.
Mitigation strategies must focus on enforcing strict least-privilege principles in file system operations. Developers should ensure that all temporary and autosave directories are created with restrictive permissions, typically read-write for the owner only, preventing access from other users or processes. Implementing input validation is also crucial; any data written to these files should be sanitized to prevent injection attacks if those files are ever parsed by the application logic. Furthermore, utilizing secure APIs provided by the operating system for file creation and management can help ensure that default security policies are applied correctly. Regular code audits focusing on permission assignments and static analysis tools configured to detect insecure file handling practices will aid in identifying similar vulnerabilities before deployment.