Adobe Substance 3D Stager: Out-of-bounds write leads to code execution
Summary
Adobe Substance 3D Stager up to and including version 3.1.8 contains an out-of-bounds write vulnerability (CWE-787). An attacker can execute arbitrary code with the rights of the current user by persuading a victim to open a malicious file. Adobe has released a security update, and Adobe is not aware of any exploits in the wild.
Affected
- Adobe Substance 3D Stager 3.1.8 and earlier on Windows and macOS
Fixed in
- Adobe Substance 3D Stager 3.1.9 (Windows and macOS)
Workaround
- Unknown. No vendor-published workaround exists; the patch should be applied.
- Until patching, avoid opening untrusted Stager project or model files.
Exploitation
- Adobe is not aware of any exploits in the wild.
- No public proof of concept found; this does not prove none exists.
- User interaction required: the victim must open a malicious file.
- Local attack vector, no privileges required.
Our recommendation
- Inventory Adobe Substance 3D Stager on Windows and macOS endpoints.
- Update to version 3.1.9 or later via the Creative Cloud desktop app or the Admin Console.
- Until patched, instruct users not to open untrusted Stager files, especially files received by email, download or shared projects.
- Verify CVE-2026-103837 in the Adobe bulletin APSB26-170 or NVD, as the vulnerability table was not fully confirmed.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Adobe Security Bulletin APSB26-170 www.adobe.com
- Vulners CVE record CVE-2026-103837 vulners.com
- Tenable Nessus plugin for APSB26-170 vulners.com
- Mallory article on APSB26-170 mallory.ai
- Adobe Substance 3D Stager product page www.adobe.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 2 Nov 2026, 00:14.
Original description (NVD)
Substance3D - Stager 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.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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