Description

Substance3D - Designer is affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-25T18:17:55.377Z",
  "pubdate": "2026-08-25T18:17:55.377Z",
  "executiveSummary": "Substance3D Designer is susceptible to a critical heap-based buffer overflow vulnerability. This memory corruption flaw allows an attacker to execute arbitrary code within the security context of the current user.\nThe vulnerability is triggered when the application processes a specially crafted, malicious file. Successful exploitation leads to unauthorized code execution, potentially allowing the attacker to compromise the integrity, confidentiality, and availability of the user's system.\nThe attack requires social engineering to trick a user into opening a malicious file, as the vulnerability is not remotely exploitable without user interaction.\nGiven the potential for arbitrary code execution, this vulnerability carries significant risk. Organizations should prioritize updating Substance3D Designer when security patches become available and ensure users are trained to exercise caution when opening files from untrusted sources.",
  "technicalDetails": "The vulnerability is identified as a heap-based buffer overflow, a class of memory corruption issue that occurs when a program writes data beyond the boundaries of a buffer allocated in the heap memory segment. In the context of Substance3D Designer, this typically occurs during the parsing or deserialization of complex file formats supported by the application.\nThe root cause originates from insufficient boundary checking during the processing of file input data. When the application attempts to read a malicious file, it may fail to validate the size of incoming data structures before copying them into a fixed-size heap-allocated buffer. By providing an input that exceeds the allocated capacity, an attacker can overwrite adjacent heap chunks.\nThe exploitation flow initiates when a victim opens a specially crafted file within Substance3D Designer. As the application's parsing engine traverses the file structure, it encounters the malicious payload. Because the application lacks robust bounds validation, the oversized data spills over the allocated heap buffer, corrupting adjacent heap metadata or application-specific objects.\nAn attacker can leverage this corruption to overwrite critical structures such as function pointers or object vtables. By redirecting the flow of execution, the attacker can force the application to execute arbitrary shellcode embedded within the malicious file or trigger Return-Oriented Programming (ROP) chains to bypass security controls like Data Execution Prevention (DEP) or Address Space Layout Randomization (ASLR).\nBecause the execution occurs within the context of the current user, the payload inherits the user's permissions. This allows the attacker to access, modify, or delete sensitive files, install persistent malware, or move laterally within the network if the user's account has elevated privileges. No prior authentication is required for this attack, and the primary vector is file-based interaction.\nThis vulnerability highlights a critical failure in the handling of untrusted input data within the application's file-parsing routines. The impact is significant, as successful exploitation facilitates full system control relative to the user's privilege level."
}