Overview
The cybersecurity community needs to be aware of a significant vulnerability that has been identified in Substance3D – Viewer versions 0.25 and earlier. This vulnerability, designated as CVE-2025-49569, exposes users to potential system compromise and data leakage, with an associated CVSS Severity Score of 7.8. Given the severity of this issue, it is crucial to understand the nature of this vulnerability, its potential impact, and how it can be mitigated.
Vulnerability Summary
CVE ID: CVE-2025-49569
Severity: High – 7.8 (CVSS score)
Attack Vector: Local
Privileges Required: None
User Interaction: Required
Impact: Arbitrary code execution, potential system compromise, and data leakage
Affected Products
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Product | Affected Versions
Substance3D – Viewer | 0.25 and earlier
How the Exploit Works
The exploit takes advantage of an out-of-bounds write vulnerability in Substance3D – Viewer. An attacker can craft a malicious file that when opened by the victim, would trigger the vulnerability. The vulnerability then allows the attacker to write data outside the expected boundaries of allocated memory. This unanticipated behavior can lead to the execution of arbitrary code in the context of the current user. Consequently, the attacker can gain unauthorized access or control of the system, leading to potential system compromise and data leakage.
Conceptual Example Code
Below is a conceptual example illustrating how the vulnerability might be exploited. The malicious payload is embedded in a file that triggers the out-of-bounds write when opened.
malicious_file.s3d:
{
"header": "standard S3D header",
"data": "valid data",
"malicious_payload": "code triggering out-of-bounds write"
}After the victim opens this file using Substance3D – Viewer, the malicious payload is executed, resulting in arbitrary code execution in the context of the current user.
Mitigation Guidance
Substance3D – Viewer users are strongly advised to apply the vendor-supplied patch as soon as possible to mitigate this vulnerability. In the absence of the patch, users can also utilize Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) as temporary mitigation measures to detect and block any attempts to exploit this vulnerability. As always, users are urged to avoid opening files from untrusted sources, which is the primary attack vector for this vulnerability.
