# CVE-2026-21300: Adobe Substance3D Modeler NULL pointer dereference

Source: https://junglewise.ai/threats/cve-2026-21300-adobe-substance3d-modeler-null-pointer-dereference  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-13. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-21300 · Severity: medium · CVSS 5.5 · Published 2026-01-13

Substance3D Modeler is Adobe's 3D modeling application used by designers and artists to create digital content. A flaw in the application allows it to crash when a user opens a specially crafted malicious file, disrupting work and availability. The vulnerability requires a user to be tricked into opening a malicious file, and poses a denial-of-service risk rather than a path to compromise.

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

## Quick answers

**Is CVE-2026-21300 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21300 being exploited in the wild.

**How severe is CVE-2026-21300?** Medium severity, with a CVSS score of 5.5, published 13 January 2026.

**Which products and versions are affected?** Adobe Substance3D Modeler 1.22.4 and earlier.

**Is there a fix for CVE-2026-21300?** 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-2026-21300 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-21300?** Check whether you run Adobe Substance 3d Modeler or Adobe Substance3D Modeler 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

A NULL pointer dereference vulnerability exists in Substance3D Modeler versions 1.22.4 and earlier. The vulnerability is triggered when the application attempts to process malformed or specially crafted file input without proper validation, dereferencing a null pointer and causing the application to crash. Exploitation requires user interaction—a victim must open a malicious file—and does not require network access or elevated privileges. An attacker can achieve denial-of-service by preventing the target user from using the application, though the impact is limited to application availability on the affected machine.

## Affected products

- Adobe Substance3D Modeler 1.22.4 and earlier

## Timeline

- 2026-01-13: disclosed

## References

- [https://helpx.adobe.com/security/products/substance3d-modeler/apsb26-08.html](https://helpx.adobe.com/security/products/substance3d-modeler/apsb26-08.html)

## Related threats

- [Adobe Substance3D Modeler out-of-bounds write](https://junglewise.ai/threats/cve-2026-83963-substance3d-modeler-is-affected-by-an-out-of-bounds-write)
- [Adobe Substance3D Modeler stack buffer overflow](https://junglewise.ai/threats/cve-2026-83962-substance3d-modeler-is-affected-by-a-stack-based-buffer-overflow)
- [Adobe Substance3D Modeler out-of-bounds write](https://junglewise.ai/threats/cve-2026-81998-substance3d-modeler-is-affected-by-an-out-of-bounds-write)
- [Adobe Substance3D Modeler out-of-bounds write](https://junglewise.ai/threats/cve-2026-79906-substance3d-modeler-is-affected-by-an-out-of-bounds-write)
- [Adobe Substance3D Modeler out-of-bounds read](https://junglewise.ai/threats/cve-2026-21348-adobe-substance3d-modeler-out-of-bounds-read)