# CVE-2026-103823: Adobe Substance 3D Designer stack-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-103823-substance3d-designer-is-affected-by-a-stack-based-buffer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-103823 · Severity: medium · CVSS 5.5 · Published 2026-10-13

Adobe Substance 3D Designer, a 3D design and texturing application, is affected by a stack-based buffer overflow vulnerability that can crash the application when a victim opens a malicious file. An attacker can exploit this flaw to cause a denial-of-service condition, preventing users from accessing the application temporarily. The vulnerability requires user interaction and does not allow remote exploitation or data theft.

Technologies: [Adobe Substance 3d Designer](https://junglewise.ai/threats/technologies/substance-3d-designer), [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-2026-103823 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103823 being exploited in the wild.

**How severe is CVE-2026-103823?** Medium severity, with a CVSS score of 5.5, published 13 October 2026.

**Which products and versions are affected?** Adobe Substance 3d Designer 16.0.5 and earlier.

**Is there a fix for CVE-2026-103823?** Yes: fixed in 16.0.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-103823 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-103823?** Check whether you run Adobe Substance 3d Designer, 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 16.0.7

## Technical details

CVE-2026-103823 is a stack-based buffer overflow (CWE-121) in Adobe Substance 3D Designer that results in application denial-of-service. The vulnerability requires local attack vector with user interaction (opening a malicious file), no elevated privileges. The impact is limited to availability; no code execution, confidentiality, or integrity impact.

## Affected products

- Adobe Substance 3D Designer 16.0.5 and earlier

## Timeline

- 2026-10-13: disclosed

## References

- [https://www.adobe.com/trust/security/products/substance3d-designer/apsb26-169.html](https://www.adobe.com/trust/security/products/substance3d-designer/apsb26-169.html)

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