CVE-2025-21164 in Substance3D
Summary
by MITRE • 07/08/2025
Substance3D - Designer versions 14.1 and earlier are affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
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Analysis
by VulDB Data Team • 07/08/2025
The vulnerability identified as CVE-2025-21164 affects Substance3D Designer versions 14.1 and earlier, representing a critical out-of-bounds write flaw that could enable remote code execution when a user opens a malicious file. This vulnerability resides within the software's file processing mechanisms and demonstrates a classic memory safety issue that has been extensively documented in cybersecurity literature. The flaw specifically manifests when the application attempts to write data beyond the allocated memory boundaries of a buffer, creating a condition where attacker-controlled data can overwrite adjacent memory locations.
The technical implementation of this vulnerability involves improper bounds checking during file parsing operations within the Substance3D Designer application. When processing specially crafted malicious files, the software fails to validate the size or structure of incoming data before attempting to write it to memory regions. This deficiency allows an attacker to construct a file that, when opened by an unsuspecting user, triggers the out-of-bounds write condition. The vulnerability is classified under CWE-787, which specifically addresses out-of-bounds write conditions, and aligns with ATT&CK technique T1203, which involves exploiting software vulnerabilities through malicious file manipulation. The issue requires user interaction to exploit, making it a client-side vulnerability that relies on social engineering or targeted attacks to succeed.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with the ability to run arbitrary code with the privileges of the currently logged-in user. This means that successful exploitation could lead to complete system compromise, data exfiltration, or the installation of additional malicious software. The affected software environment represents a common point of entry for attackers targeting creative professionals who frequently work with design tools, making it particularly concerning in enterprise environments where such software is widely deployed. The vulnerability's severity is amplified by the fact that it requires minimal user interaction beyond opening a file, which can be achieved through various social engineering techniques or by embedding malicious files in seemingly legitimate design projects.
Mitigation strategies for CVE-2025-21164 should prioritize immediate software updates from the vendor, as this represents a critical security flaw that requires core application patches to resolve. Organizations should implement strict file validation policies and consider deploying sandboxing solutions to isolate the execution of design files from critical system resources. Network-level defenses such as email filtering and web application firewalls can help prevent the delivery of malicious files to users, while user education programs should emphasize the importance of only opening files from trusted sources. Security teams should also monitor for indicators of compromise related to this vulnerability and implement automated patch management systems to ensure rapid deployment of vendor fixes. The remediation process must include thorough testing of updated software versions to prevent regression issues while maintaining operational continuity in design workflows.