CVE-2026-30287 Overview
An arbitrary file overwrite vulnerability has been identified in Deep Thought Industries ACE Scanner PDF Scanner v1.4.5. This flaw allows attackers to overwrite critical internal files via the file import process, potentially leading to arbitrary code execution or information exposure. The vulnerability is classified under CWE-73 (External Control of File Name or Path), indicating improper handling of file paths during the import operation.
Critical Impact
Successful exploitation of this vulnerability could allow attackers to overwrite critical application files, potentially achieving arbitrary code execution or exposing sensitive information on affected Android devices.
Affected Products
- Deep Thought Industries ACE Scanner PDF Scanner v1.4.5
- ACE Scanner for Android (available on Google Play Store)
- deepthought.industries:ace_scanner component
Discovery Timeline
- 2026-04-01 - CVE-2026-30287 published to NVD
- 2026-04-02 - Last updated in NVD database
Technical Details for CVE-2026-30287
Vulnerability Analysis
This vulnerability stems from improper validation of file paths during the PDF import process in ACE Scanner. When a user imports a file, the application fails to adequately sanitize or validate the destination path, allowing malicious actors to craft specially formatted inputs that can write to arbitrary locations within the application's data directory or other accessible storage areas.
The local attack vector requires the attacker to have some level of access to the device, either through a malicious application installed on the same device or by convincing the user to import a specially crafted file. Despite requiring local access, the vulnerability does not require any privileges or user interaction beyond the initial import action, making it particularly dangerous in scenarios where users regularly import PDF documents from untrusted sources.
Root Cause
The root cause of this vulnerability is classified as CWE-73: External Control of File Name or Path. The application accepts external input that specifies a file name or path without proper validation, allowing attackers to traverse directories or specify absolute paths. This lack of input sanitization in the file import handler permits writing to unintended locations within the application's accessible file system.
Attack Vector
The attack vector is local, meaning an attacker must have some form of access to the target device. Exploitation can occur through several scenarios:
The attacker crafts a malicious file with embedded path traversal sequences (such as ../) or absolute path references. When the victim imports this file through the ACE Scanner application, the vulnerability allows the attacker-controlled content to be written to critical application files or sensitive locations.
Alternatively, a malicious application installed on the same device could exploit this vulnerability by programmatically triggering the import process with crafted file paths, potentially without direct user awareness.
The vulnerability can lead to arbitrary code execution if attackers overwrite executable code, libraries, or configuration files that the application loads during runtime. Information exposure may occur if attackers can overwrite files in a way that causes the application to leak sensitive data.
Detection Methods for CVE-2026-30287
Indicators of Compromise
- Unexpected file modifications in the ACE Scanner application data directory
- Presence of files with path traversal sequences (../) in import logs or file system
- Unusual application behavior or crashes following PDF import operations
- Modified application configuration or library files with unexpected timestamps
Detection Strategies
- Monitor file system activity for write operations outside the expected import destination directories
- Implement file integrity monitoring on critical application files to detect unauthorized modifications
- Review application logs for import operations involving suspicious file paths or traversal sequences
- Deploy mobile threat detection solutions that can identify applications attempting filesystem manipulation
Monitoring Recommendations
- Enable detailed logging for the ACE Scanner application's file import functionality
- Implement alerting for any file write operations that target system or application directories
- Regularly audit installed applications for known vulnerable versions of ACE Scanner
- Monitor for anomalous application behavior patterns that may indicate post-exploitation activity
How to Mitigate CVE-2026-30287
Immediate Actions Required
- Uninstall or disable ACE Scanner PDF Scanner v1.4.5 until a patched version is available
- Avoid importing PDF files from untrusted sources using the affected application
- Review device file system for any signs of unauthorized modifications
- Consider using alternative PDF scanning applications that are not affected by this vulnerability
Patch Information
No official vendor patch has been announced at the time of this writing. Users should monitor the Deep Thought Industries website and the Google Play Store listing for security updates. Additional technical details regarding this vulnerability can be found in the GitHub Secsys-FDU Issue #16 and through Secsys Fudan University.
Workarounds
- Restrict the ACE Scanner application's access to storage using Android's permission management
- Only import PDF files from trusted, verified sources
- Consider running the application in an isolated profile or work container if available on your device
- Implement mobile device management (MDM) policies to restrict vulnerable application usage in enterprise environments
- Regularly backup important data to minimize impact from potential file overwrites
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
