CVE-2025-54245 is a high-severity out-of-bounds write vulnerability (CWE-787) affecting Adobe Substance3D - Viewer versions 0.25.1 and earlier. This vulnerability arises when the application improperly handles memory boundaries while processing certain input data, specifically when opening crafted malicious files. An out-of-bounds write can corrupt adjacent memory, potentially allowing an attacker to execute arbitrary code within the context of the current user. Exploitation requires user interaction, as the victim must open a maliciously crafted file, which could be delivered via email, download, or other file-sharing methods. The vulnerability has a CVSS v3.1 base score of 7.8, reflecting high impact on confidentiality, integrity, and availability, with low attack complexity but requiring user interaction and local access vector. No known exploits are currently reported in the wild, and no patches have been published yet. Given the nature of the vulnerability, successful exploitation could lead to full compromise of the affected user's session, including data theft, installation of malware, or lateral movement within a network if the compromised user has elevated privileges or access to sensitive resources. Adobe Substance3D - Viewer is a specialized 3D asset viewing tool used primarily by creative professionals in design, gaming, and digital content creation workflows.

For European organizations, this vulnerability poses a significant risk especially to sectors relying on digital content creation, such as media, entertainment, advertising, and manufacturing industries using 3D modeling. Compromise of workstations running Substance3D - Viewer could lead to intellectual property theft, unauthorized access to proprietary designs, or disruption of creative workflows. Since exploitation requires user interaction, targeted phishing or social engineering campaigns could be used to deliver malicious files. The impact extends beyond individual users to organizational reputation and compliance, particularly under GDPR, where data breaches involving personal or sensitive data could result in regulatory penalties. Additionally, compromised endpoints could serve as footholds for attackers to escalate privileges or move laterally within corporate networks, potentially affecting broader IT infrastructure. The lack of available patches increases the window of exposure, necessitating immediate risk management measures.

1. Implement strict email and file filtering to block or quarantine suspicious attachments, especially those related to 3D asset files commonly opened by Substance3D - Viewer. 2. Educate users on the risks of opening files from untrusted or unknown sources, emphasizing the specific threat of malicious 3D files. 3. Employ application whitelisting and sandboxing techniques to isolate Substance3D - Viewer processes, limiting the impact of potential exploitation. 4. Monitor endpoint behavior for unusual activity indicative of exploitation attempts, such as unexpected memory access patterns or process anomalies. 5. Maintain up-to-date backups of critical design files and project data to enable recovery in case of compromise. 6. Coordinate with Adobe for timely patch deployment once available, and consider temporary disabling or restricting use of Substance3D - Viewer in high-risk environments until patched. 7. Use endpoint detection and response (EDR) tools to detect and respond to exploitation attempts rapidly. 8. Review and enforce least privilege principles for users running Substance3D - Viewer to minimize potential damage from exploitation.