CVE-2026-34684 — Code Execution
CVE-2026-34684 — Substance3D - Designer versions 15.1.0 and earlier are 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.
What This Means For You
- If your environment is affected by CWE-787, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-34684 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-34684 - Substance3D Designer Malicious File Open
title: CVE-2026-34684 - Substance3D Designer Malicious File Open
id: scw-2026-05-12-ai-1
status: experimental
level: high
description: |
Detects the execution of Substance 3D Designer.exe when launched by common office applications, indicating a potential user interaction to open a malicious file, as described in CVE-2026-34684.
author: SCW Feed Engine (AI-generated)
date: 2026-05-12
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-34684/
tags:
- attack.execution
- attack.t1204.002
logsource:
category: process_creation
detection:
selection:
Image|endswith:
- 'Substance 3D Designer.exe'
ParentImage|contains:
- 'winword.exe'
- 'excel.exe'
- 'outlook.exe'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-34684 | vulnerability | CVE-2026-34684 |
| CWE-787 | weakness | CWE-787 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 12, 2026 at 22:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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