CVE-2026-100131 in Substance 3D Sampler
Summary
by MITRE • 10/13/2026
Substance3D - Sampler is affected by an out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. 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 • 10/13/2026
The identified vulnerability within Substance3D Sampler represents a critical security flaw classified as an out-of-bounds read, which falls under the Common Weakness Enumeration category CWE-125. This type of memory safety error occurs when software attempts to access data at a memory location that is outside the boundaries of the intended buffer or array structure. In the context of Substance3D Sampler, this flaw likely stems from insufficient validation checks during the parsing and processing of external asset files. When the application ingests complex 3D materials or textures, it must allocate specific memory regions to store metadata and pixel data. If the input file contains malformed headers or corrupted structures that specify incorrect lengths or offsets, the software may attempt to read beyond the allocated buffer limits. This behavior is a classic symptom of improper boundary validation, where the application fails to verify that requested access indices are within the valid range before executing memory reads.
The operational impact of this vulnerability centers on information disclosure rather than direct code execution or system compromise. Because the flaw involves reading from an out-of-bounds location in memory, it can result in the leakage of sensitive data residing adjacent to the target buffer. This leaked data may include internal application states, cryptographic keys, user credentials, or other proprietary assets stored in the process's virtual address space. While this does not immediately grant an attacker remote code execution capabilities, it significantly degrades the confidentiality guarantees expected from professional-grade creative software. The exposure of such memory contents could facilitate further attacks by providing attackers with valuable context about the victim environment, potentially aiding in more sophisticated exploitation chains or social engineering efforts based on revealed internal structures.
Exploitation of this vulnerability is constrained by a requirement for user interaction, specifically necessitating that a victim opens a maliciously crafted file within Substance3D Sampler. This characteristic aligns with attack vectors described in the MITRE ATT&CK framework under techniques involving lure-based execution or phishing campaigns where users are tricked into opening compromised documents. The attacker must construct a specially designed asset file containing malformed data structures that trigger the out-of-bounds read condition upon loading. Since the vulnerability is triggered during the normal operation of viewing or importing assets, it relies heavily on social engineering to bypass defensive perimeter controls. Users who habitually open files from untrusted sources without verifying their integrity are at the highest risk. The lack of automatic sandboxing for certain file types in some creative applications further exacerbates this risk by allowing potentially malicious content to interact directly with system resources upon opening.
To mitigate the risks associated with this vulnerability, organizations and individual users should prioritize immediate software updates provided by Adobe or the Substance3D development team. These updates typically include patches that enforce strict boundary checks during file parsing routines, ensuring that all memory accesses remain within allocated limits regardless of input data anomalies. In environments where patching is not immediately feasible, implementing application whitelisting can restrict the execution of untrusted binaries and limit the impact if a vulnerability is exploited. Additionally, users should adopt rigorous operational security practices by verifying the source of any 3D assets or project files before opening them in professional tools. Utilizing sandboxed environments for reviewing suspicious materials can also isolate potential memory leaks from critical system processes. Regular audits of software versions and adherence to vendor-recommended configuration settings are essential components of a comprehensive defense strategy against such memory corruption vulnerabilities.