Description

Substance3D - Painter is affected by an out-of-bounds write 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": "2026-08-25T18:18:03.360Z",
  "pubdate": "2026-08-25T18:18:03.360Z",
  "executiveSummary": "Substance3D - Painter is susceptible to an out-of-bounds write vulnerability that poses a significant security risk to end-users.\nThis vulnerability is classified as an out-of-bounds write, which occurs when an application writes data past the intended boundary of a buffer.\nSuccessful exploitation of this flaw allows a remote attacker to achieve arbitrary code execution within the security context of the current user account.\nThe attack vector is triggered when a victim interacts with a specially crafted, malicious file while utilizing Substance3D - Painter.\nThe impact includes potential system compromise, data theft, and unauthorized control over the application's runtime environment.\nDue to the nature of this vulnerability, the primary risk lies in the execution of arbitrary payloads triggered by user-initiated file operations.\nThere is no requirement for network exposure or prior authentication, as the attack is facilitated through client-side interaction with tainted input.",
  "technicalDetails": "The vulnerability resides in the data parsing or rendering logic of Substance3D - Painter, where it fails to properly validate the length of input data before performing memory write operations.\nAn out-of-bounds write occurs when the software computes an incorrect memory offset or fails to enforce boundary constraints during the processing of structured file elements.\nThe root cause is likely an insufficient bounds check on an index or pointer used for writing data during the parsing of a malicious file format.\nAttack flow begins with the delivery of a malicious file to the target system. Upon the user opening this file within Substance3D - Painter, the vulnerable component initiates a parsing sequence that processes the embedded malicious data.\nWhen the application reaches the flawed code path, the lack of sanitization allows the attacker to influence the memory address where the write operation occurs.\nThis can be leveraged to overwrite critical internal structures, such as return addresses on the stack, function pointers in the heap, or other sensitive objects residing in memory.\nBy controlling the contents of the write operation and the target memory location, an attacker can hijack the application's control flow.\nOnce control flow is redirected, the attacker can execute arbitrary machine code, effectively bypassing typical security measures such as Data Execution Prevention (DEP) or Address Space Layout Randomization (ASLR), depending on the specific implementation of the exploit.\nPost-exploitation, the attacker operates with the same privileges as the user running Substance3D - Painter. This allows for the execution of secondary payloads, lateral movement within the network, or the installation of persistent threats on the host system.\nSince the vulnerability is triggered by user interaction, it essentially weaponizes legitimate file formats that the application is designed to ingest, making traditional perimeter security measures largely ineffective against this class of threat.\nMemory corruption vulnerabilities of this type are dangerous because they allow the attacker to execute code during the initial parsing phase, often before the application has fully initialized or applied security policies, making detection difficult."
}