CVE-2025-43583 is a vulnerability identified in Adobe Substance3D - Viewer versions 0.22 and earlier, characterized as a NULL Pointer Dereference (CWE-476). This type of vulnerability occurs when the application attempts to access or dereference a pointer that is set to NULL, leading to an unexpected crash of the application. In this case, exploitation results in a denial-of-service (DoS) condition by crashing the Substance3D - Viewer software. The vulnerability requires user interaction, specifically that the victim opens a maliciously crafted file designed to trigger the NULL pointer dereference. There is no indication that this vulnerability allows for code execution, privilege escalation, or data leakage; its impact is limited to availability disruption of the affected application. The CVSS v3.1 base score is 5.5 (medium severity), reflecting that the attack vector is local (AV:L), requires low attack complexity (AC:L), no privileges (PR:N), but does require user interaction (UI:R). The impact is solely on availability (A:H) with no confidentiality or integrity impact. No patches or fixes have been published at the time of this report, and there are no known exploits in the wild. The vulnerability affects early versions of Adobe Substance3D - Viewer, a tool used primarily for viewing 3D assets and materials, which is commonly employed by digital artists, designers, and creative professionals.

For European organizations, the primary impact of this vulnerability is the potential disruption of workflows that rely on Adobe Substance3D - Viewer for viewing and inspecting 3D content. Industries such as media, entertainment, gaming, automotive design, and manufacturing that utilize 3D modeling and visualization tools could experience interruptions if attackers deliver malicious files to users, causing application crashes. While the vulnerability does not compromise data confidentiality or integrity, repeated denial-of-service conditions could lead to productivity losses, delayed project timelines, and increased support costs. Since exploitation requires user interaction, the risk is mitigated somewhat by user awareness and secure handling of files. However, targeted phishing or social engineering campaigns could increase the likelihood of successful exploitation. The absence of known exploits in the wild reduces immediate risk, but organizations should remain vigilant given the medium severity rating and the potential for future exploit development.

1. Implement strict file handling policies: Educate users to only open 3D asset files from trusted sources and verify file authenticity before opening. 2. Use sandboxing or isolated environments when opening untrusted or external files to contain potential crashes and prevent broader disruption. 3. Monitor Adobe’s official channels for patches or updates addressing this vulnerability and apply them promptly once available. 4. Employ endpoint protection solutions that can detect anomalous application crashes or suspicious file activity related to Substance3D - Viewer. 5. Incorporate user training focused on recognizing phishing attempts and malicious file delivery methods to reduce the risk of user interaction with crafted files. 6. Consider restricting the use of Substance3D - Viewer to essential personnel and limit file sharing channels to reduce exposure. 7. Maintain regular backups of critical project files and configurations to minimize impact from potential disruptions.