Adobe Substance 3D Stager: Out-of-bounds read when parsing crafted files
Summary
Adobe Substance 3D Stager contains an out-of-bounds read when parsing a crafted file, which can read past the end of an allocated memory structure. An attacker can use this to execute code in the context of the current user. Exploitation requires that a victim opens a malicious file, so the attack typically arrives via phishing or shared files rather than over the network.
Affected
- Adobe Substance 3D Stager 3.1.8 and earlier (Windows and macOS)
Fixed in
- Adobe Substance 3D Stager 3.1.9 (according to Adobe bulletin APSB26-170)
Workaround
- No vendor workaround known.
- Until patched: do not open scene files from untrusted or unexpected sources.
Exploitation
- Adobe is not aware of any exploits in the wild for the issues in this update.
- No public proof of concept found. CISA SSVC: exploitation none, automatable no.
Our recommendation
- Inventory all Stager installations, including those installed via Steam.
- Update to 3.1.9 or later. The release also fixes 15 other vulnerabilities.
- Confirm that Steam installations receive version 3.1.9, as this could not be verified.
- Instruct users not to open untrusted scene files until the update is applied.
- Recheck bulletin APSB26-170 for changes.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Adobe Security Bulletin APSB26-170 www.adobe.com
- CVE record (vulners, CNA data) vulners.com
- Third-party report on Stager 3.1.9 release 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, 00:16.
Original description (NVD)
Substance3D - Stager is affected by an out-of-bounds read vulnerability when parsing a crafted file, which could result in a read past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute code 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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