# CVE-2026-21337: Adobe Substance3D Designer out-of-bounds read in file parsing

Source: https://junglewise.ai/threats/cve-2026-21337-adobe-substance3d-designer-out-of-bounds-read-in-file-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-02-10. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-21337 · Severity: medium · CVSS 5.5 · Published 2026-02-10

Adobe Substance3D Designer is a 3D design application used by artists and designers to create digital assets. Versions 15.1.0 and earlier contain a memory reading vulnerability that could expose sensitive data when a user opens a specially crafted malicious file. An attacker could potentially access confidential information stored in application memory, but successful exploitation requires user interaction (opening a file).

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-2026-21337 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21337 being exploited in the wild.

**How severe is CVE-2026-21337?** Medium severity, with a CVSS score of 5.5, published 10 February 2026.

**Which products and versions are affected?** Adobe Substance3D Designer 15.1.0 and earlier.

**Is there a fix for CVE-2026-21337?** 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-2026-21337 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-21337?** Check whether you run Adobe Substance 3d Designer or Adobe Substance3D Designer 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.

## Technical details

The vulnerability is an out-of-bounds read (CWE-125) in Substance3D Designer's file parsing logic. The flaw allows an attacker to read arbitrary memory locations by crafting a malicious file that triggers out-of-bounds access during parsing. The attack requires user interaction, as a victim must open the malicious file within the application. This could lead to exposure of sensitive data stored in memory, including but not limited to project data, credentials, or other sensitive information. The issue affects versions 15.1.0 and earlier, and patches are expected to be available from Adobe.

## Affected products

- Adobe Substance3D Designer 15.1.0 and earlier

## Timeline

- 2026-02-10: disclosed

## References

- [https://helpx.adobe.com/security/products/substance3d_designer/apsb26-19.html](https://helpx.adobe.com/security/products/substance3d_designer/apsb26-19.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)