CVE-2025-21130
📋 TL;DR
CVE-2025-21130 is an out-of-bounds write vulnerability in Adobe Substance3D Stager that allows arbitrary code execution when a user opens a malicious file. This affects users of Substance3D Stager versions 3.0.4 and earlier, potentially compromising their systems.
💻 Affected Systems
- Adobe Substance3D Stager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the current user, leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation leading to data exfiltration, credential harvesting, or installation of additional malware.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially only affecting user data within the application context.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) and knowledge of file format manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.5 or later
Vendor Advisory: https://helpx.adobe.com/security/products/substance3d_stager/apsb25-03.html
Restart Required: No
Instructions:
1. Open Substance3D Stager. 2. Go to Help > Check for Updates. 3. Follow prompts to install version 3.0.5 or later. 4. Verify installation by checking version in About dialog.
🔧 Temporary Workarounds
Restrict file processing
allConfigure application to only open trusted files from verified sources
🧯 If You Can't Patch
- Implement application allowlisting to restrict Substance3D Stager execution
- Use endpoint protection with file reputation services to block malicious files
🔍 How to Verify
Check if Vulnerable:
Check Substance3D Stager version in application's About dialog or Help menuCheck Version:
Not applicable - check via application GUIVerify Fix Applied:
Confirm version is 3.0.5 or later in About dialog📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unusual file processing activity from Substance3D Stager
Network Indicators:
- Unexpected outbound connections following file opening
SIEM Query:
process_name:"Substance3D Stager" AND (event_type:crash OR file_operation:suspicious)