# CVE-2026-48426: Adobe Substance3D Designer out-of-bounds write

Source: https://junglewise.ai/threats/cve-2026-48426-adobe-substance3d-designer-out-of-bounds-write  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-25. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-48426 · Severity: high · CVSS 7.8 · Published 2026-08-25

Adobe Substance3D Designer is a professional 3D design application used to create digital assets and visual content. The application contains an out-of-bounds write vulnerability that could allow an attacker to execute arbitrary code with the privileges of the user running the application. Exploitation requires a user to open a malicious file, making this a delivery vector for targeted attacks on creative professionals.

Technologies: [Adobe Substance 3d Designer](https://junglewise.ai/threats/technologies/substance-3d-designer), [Adobe Substance3D Designer](https://junglewise.ai/threats/technologies/substance3d-designer). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe).

## Quick answers

**Is CVE-2026-48426 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-48426 being exploited in the wild.

**How severe is CVE-2026-48426?** High severity, with a CVSS score of 7.8, published 25 August 2026.

**Which products and versions are affected?** Adobe Substance3D Designer.

**Is there a fix for CVE-2026-48426?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-48426 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-48426?** Check whether you run Adobe Substance 3d Designer or Adobe Substance3D Designer. 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.

## Technical details

Substance3D Designer is vulnerable to an out-of-bounds write flaw in its file parsing logic. The vulnerability exists in the file handling mechanism and is triggered when a victim opens a specially crafted malicious file. An attacker can exploit this memory corruption issue to overwrite memory regions and achieve arbitrary code execution within the security context of the current user. The attack requires user interaction (opening a file), but no authentication is required. Patches or mitigations should be applied as released by Adobe.

## Affected products

- Adobe Substance3D Designer

## Timeline

- 2026-08-25: disclosed

## References

- [https://helpx.adobe.com/security/products/substance3d_designer/apsb26-115.html](https://helpx.adobe.com/security/products/substance3d_designer/apsb26-115.html)

## Related threats

- [Adobe Substance 3D Designer NULL pointer dereference denial-of-service](https://junglewise.ai/threats/cve-2026-103829-substance3d-designer-is-affected-by-a-null-pointer-dereference)
- [Adobe Substance 3D Designer null pointer dereference](https://junglewise.ai/threats/cve-2026-103828-substance3d-designer-is-affected-by-a-null-pointer-dereference)
- [Adobe Substance 3D Designer stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-103827-substance3d-designer-is-affected-by-a-stack-based-buffer)
- [Adobe Substance 3D Designer null pointer dereference](https://junglewise.ai/threats/cve-2026-103826-substance3d-designer-is-affected-by-a-null-pointer-dereference)
- [Adobe Substance 3D Designer out-of-bounds read in file parsing](https://junglewise.ai/threats/cve-2026-103825-substance3d-designer-is-affected-by-an-out-of-bounds-read)