# CVE-2026-103851: Adobe Substance 3D Stager stack-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-103851-substance3d-stager-is-affected-by-a-stack-based-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-103851 · Severity: high · CVSS 7.8 · Published 2026-10-13

Adobe Substance 3D Stager is a 3D design and prototyping application used by creative professionals. The application contains multiple memory corruption vulnerabilities including stack-based buffer overflows that can allow an attacker to execute arbitrary code when a user opens a malicious file. Adobe has released patches and recommends all users update to version 3.1.9 immediately.

Technologies: [Adobe Substance 3d Stager](https://junglewise.ai/threats/technologies/substance-3d-stager), [Apple macOS](https://junglewise.ai/threats/technologies/macos), [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe), [Apple](https://junglewise.ai/threats/vendors/apple), [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-103851 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103851 being exploited in the wild.

**How severe is CVE-2026-103851?** High severity, with a CVSS score of 7.8, published 13 October 2026.

**Which products and versions are affected?** Adobe Substance 3d Stager 3.1.8 and earlier.

**Is there a fix for CVE-2026-103851?** Yes: fixed in Substance 3D Stager 3.1.9. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-103851 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-103851?** Check whether you run Adobe Substance 3d Stager, Apple macOS or Microsoft Windows at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in Substance 3D Stager 3.1.9

## Technical details

The vulnerability is a stack-based buffer overflow (CWE-121) in Substance 3D Stager versions 3.1.8 and earlier. Exploitation requires local access and user interaction (opening a malicious file), but once triggered allows arbitrary code execution with the privileges of the current user. The advisory also addresses related memory corruption issues including out-of-bounds reads and writes, use-after-free, and null pointer dereference.

## Affected products

- Adobe Substance 3D Stager 3.1.8 and earlier

## Timeline

- 2026-10-13: disclosed
- 2026-10-13: patched

## References

- [https://www.adobe.com/trust/security/products/substance3d-stager/apsb26-170.html](https://www.adobe.com/trust/security/products/substance3d-stager/apsb26-170.html)

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