CVE-2026-103823 in Substance 3D Designer
Summary
by MITRE • 10/13/2026
Substance3D - Designer is affected by a Stack-based Buffer Overflow vulnerability that could result in an application denial-of-service. An attacker could exploit this vulnerability to crash the application, leading to a denial-of-service condition. 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 • 10/14/2026
The identified security flaw resides within Substance 3D Designer, a professional-grade software suite widely utilized by digital artists and game developers for creating high-fidelity textures and materials. This specific vulnerability is classified as a stack-based buffer overflow, which represents a critical memory management error where the application writes more data to a fixed-length block of memory on the call stack than it was allocated to hold. In the context of modern software engineering, such vulnerabilities often arise from legacy code paths or insufficient bounds checking when processing complex input files. The technical mechanism involves an attacker crafting a malicious file that contains specially formatted data exceeding the expected buffer limits. When Substance 3D Designer attempts to parse this oversized payload during the file opening process, the excess data overwrites adjacent memory locations on the stack, corrupting critical control structures such as return addresses or function pointers.
From an operational perspective, the immediate consequence of exploiting this vulnerability is a denial-of-service condition rather than arbitrary code execution. The corruption of the call stack typically leads to application instability, causing Substance 3D Designer to crash abruptly and terminate unexpectedly. While this prevents potential remote code execution in many scenarios due to modern operating system mitigations like Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR), it still poses a significant risk to productivity and workflow continuity for users who rely on the software for time-sensitive creative tasks. The requirement for user interaction, specifically the act of opening or importing the malicious file, classifies this as an attack vector that relies on social engineering or targeted delivery methods rather than passive network-based exploitation. This limits the blast radius but does not eliminate the threat to individual workstations and local environments where sensitive intellectual property is stored.
This vulnerability aligns with Common Weakness Enumeration (CWE) identifier CWE-121, which describes a stack-based buffer overflow resulting from copying data without proper bounds checking. Furthermore, in terms of tactical classification within the MITRE ATT&CK framework, this scenario falls under Initial Access techniques that involve user execution, specifically Tactic TA0001 and Technique T1204 if delivered via malicious documents or files designed to trick users into opening them. The lack of automatic triggering means the vulnerability is not exploitable over a network without human intervention, which reduces its severity in automated threat landscapes but increases the importance of user awareness training alongside technical controls.
To mitigate this risk, organizations and individual users must prioritize applying vendor-provided patches that address the underlying memory handling logic within Substance 3D Designer. It is imperative to maintain up-to-date software versions as Adobe releases security updates specifically targeting these buffer overflow conditions. Additionally, implementing strict file intake policies can reduce exposure; this includes restricting the ability of standard user accounts to execute or open untrusted files from external sources and utilizing sandboxed environments for previewing potentially suspicious assets before they are integrated into production pipelines. Security awareness programs should also educate staff on recognizing anomalous file types or unexpected prompts associated with 3D asset imports, ensuring that only verified and trusted source materials are processed within the application environment to prevent accidental exploitation of this denial-of-service vector.