CVE-2025-54203 is an out-of-bounds read vulnerability (CWE-125) affecting Adobe Substance3D - Modeler versions 1.22.0 and earlier. This vulnerability arises when the software improperly handles memory boundaries, allowing an attacker to read sensitive memory contents beyond the intended buffer limits. The flaw can be triggered when a user opens a specially crafted malicious file within the application. Successful exploitation could lead to disclosure of sensitive information stored in memory, such as cryptographic keys, user credentials, or other confidential data. The vulnerability does not allow modification of data or denial of service but compromises confidentiality. The CVSS v3.1 base score is 5.5 (medium severity), reflecting that exploitation requires local access (attack vector: local), low attack complexity, no privileges required, but user interaction is necessary (opening a malicious file). The scope remains unchanged, and the impact is high on confidentiality but none on integrity or availability. No known exploits are currently reported in the wild, and no patches have been published yet. The vulnerability was reserved in mid-July 2025 and published in August 2025. Given the nature of the vulnerability, it primarily targets users of Adobe Substance3D - Modeler, a 3D modeling software used in creative industries for digital content creation.

For European organizations, especially those in the creative, design, gaming, and digital media sectors that utilize Adobe Substance3D - Modeler, this vulnerability poses a risk of sensitive data leakage. Disclosure of memory contents could expose intellectual property, proprietary design data, or user credentials, potentially leading to further compromise or espionage. Since exploitation requires user interaction, phishing or social engineering campaigns could be used to trick employees into opening malicious files. The impact is more pronounced for organizations handling sensitive or regulated data, such as those in advertising, media production, or industries subject to GDPR, where data confidentiality is paramount. Although the vulnerability does not allow code execution or system takeover, the leakage of sensitive information could facilitate subsequent attacks or data breaches. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits post-disclosure.

European organizations should implement the following specific measures: 1) Restrict the use of Adobe Substance3D - Modeler to trusted users and environments, minimizing exposure. 2) Educate users on the risks of opening files from untrusted or unknown sources, emphasizing phishing awareness tailored to creative teams. 3) Employ application whitelisting and sandboxing techniques to isolate the software and limit potential data exposure. 4) Monitor and control file sharing channels to prevent distribution of malicious files targeting this vulnerability. 5) Maintain up-to-date backups of critical design data to mitigate indirect impacts. 6) Since no patches are currently available, consider temporary mitigation by disabling or limiting the use of the affected software until Adobe releases a fix. 7) Implement endpoint detection and response (EDR) solutions to monitor for suspicious activity related to file handling within Substance3D - Modeler. 8) Coordinate with Adobe for timely updates and apply patches immediately upon release.