Adobe Substance 3D Stager: Stack-based buffer overflow allows code execution
Summary
Adobe Substance 3D Stager 3.1.8 and earlier on Windows and macOS contains a stack-based buffer overflow (CWE-121). An attacker can execute arbitrary code in the context of the current user. Exploitation requires that a victim opens a malicious file, for example one received by email or from a shared drive.
Affected
- Adobe Substance 3D Stager 3.1.8 and earlier
- Platforms: Windows and macOS
Fixed in
- Adobe Substance 3D Stager 3.1.9 (unaffected)
Workaround
Unknown.
Exploitation
- Adobe is not aware of any exploits in the wild.
- No public proof of concept found.
- The VulDB entry carries a "0-Day" label that conflicts with Adobe's statement; treated as a classification artefact.
Our recommendation
- Inventory Substance 3D Stager installations on Windows and macOS endpoints.
- Update to version 3.1.9 or later via the Creative Cloud desktop app, or deploy through the Admin Console in managed environments.
- Until patched, do not open Stager files from unknown or untrusted senders.
- Re-check the NVD record and the Adobe bulletin APSB26-170 for changes in exploitation status.
- Priority: medium where the product is installed; not relevant where it is not installed.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Adobe Security Bulletin APSB26-170 www.adobe.com
- VulDB entry 418119 vuldb.com
- Vulners CVE record CVE-2026-103830 vulners.com
- Tenable Nessus plugin for APSB26-170 vulners.com
- CVE record copy (threatint) cve.threatint.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, 00:17.
Original description (NVD)
Substance3D - Stager is affected by a Stack-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.
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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