# CVE-2026-21299: Adobe Substance3D Modeler out-of-bounds write in file handling

Source: https://junglewise.ai/threats/cve-2026-21299-adobe-substance3d-modeler-out-of-bounds-write-in-file-handling  
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-2026-21299 · Severity: high · CVSS 7.8 · Published 2026-01-13

Substance3D Modeler is Adobe's 3D modeling application used by designers and artists. A vulnerability allows attackers to execute arbitrary code on a user's system if they trick a user into opening a specially crafted malicious file, potentially compromising the designer's workstation and any projects or credentials stored on it.

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-2026-21299 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21299 being exploited in the wild.

**How severe is CVE-2026-21299?** High severity, with a CVSS score of 7.8, published 13 January 2026.

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

**Is there a fix for CVE-2026-21299?** 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-2026-21299 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-21299?** 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

Substance3D Modeler versions 1.22.4 and earlier contain an out-of-bounds write vulnerability in file handling code. The vulnerability is triggered when a victim opens a malicious file, causing memory corruption that can be leveraged for arbitrary code execution with the privileges of the current user. The attack requires user interaction (opening a file) and succeeds in the context of the logged-in user. A patch is available in versions after 1.22.4.

## 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)