# CVE-2026-21341: Adobe Substance3D Stager out-of-bounds write

Source: https://junglewise.ai/threats/cve-2026-21341-adobe-substance3d-stager-out-of-bounds-write  
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-2026-21341 · Severity: high · CVSS 7.8 · Published 2026-02-10

Substance3D Stager is Adobe's 3D asset management and staging tool used by designers and artists. Versions 3.1.6 and earlier contain an out-of-bounds write vulnerability that allows attackers to execute arbitrary code with the privileges of the current user. An attacker can exploit this by crafting a malicious file that, when opened by a victim, executes code on their system.

Technologies: [Adobe Substance 3d Stager](https://junglewise.ai/threats/technologies/substance-3d-stager), [Adobe Substance3D Stager](https://junglewise.ai/threats/technologies/substance3d-stager), [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-2026-21341 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21341 being exploited in the wild.

**How severe is CVE-2026-21341?** High severity, with a CVSS score of 7.8, published 10 February 2026.

**Which products and versions are affected?** Adobe Substance3D Stager 3.1.6 and earlier.

**Is there a fix for CVE-2026-21341?** 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-2026-21341 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-21341?** Check whether you run Adobe Substance 3d Stager, Adobe Substance3D Stager, Apple macOS or one of the others listed 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 write flaw in Substance3D Stager versions 3.1.6 and earlier. The vulnerable component improperly handles file input, allowing an attacker to write beyond the bounds of an allocated memory buffer. This can result in arbitrary code execution within the security context of the current user. The attack requires user interaction—a victim must explicitly open a specially crafted malicious file. There is no indication that this vulnerability has been exploited in the wild as of the advisory date.

## Affected products

- Adobe Substance3D Stager 3.1.6 and earlier

## Timeline

- 2026-02-10: disclosed

## References

- [https://helpx.adobe.com/security/products/substance3d_stager/apsb26-20.html](https://helpx.adobe.com/security/products/substance3d_stager/apsb26-20.html)

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