# CVE-2026-48420: Adobe Substance3D Sampler out-of-bounds write

Source: https://junglewise.ai/threats/cve-2026-48420-adobe-substance3d-sampler-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-2026-48420 · Severity: high · CVSS 7.8 · Published 2026-08-25

Substance3D Sampler is a 3D texture and material creation tool used by digital artists and designers. A flaw in the software allows an attacker to execute arbitrary code on a user's system by crafting a malicious file; this requires the victim to open the file, and would give the attacker full control over the compromised machine.

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

## Quick answers

**Is CVE-2026-48420 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-48420 being exploited in the wild.

**How severe is CVE-2026-48420?** High severity, with a CVSS score of 7.8, published 25 August 2026.

**Which products and versions are affected?** Adobe Substance3D Sampler <UNKNOWN>.

**Is there a fix for CVE-2026-48420?** 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-2026-48420 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-48420?** Check whether you run Adobe Substance 3D Sampler or Adobe Substance3D Sampler 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 Sampler that can be triggered by processing a specially crafted input file. The attack requires user interaction—specifically, a victim must open a malicious file—but does not require authentication or elevated privileges beforehand. Successful exploitation results in arbitrary code execution in the context of the current user. Patches are expected to be available through Adobe's security advisory APSB26-121.

## Affected products

- Adobe Substance3D Sampler <UNKNOWN>

## Timeline

- 2026-08-25: disclosed
- advisory: APSB26-121

## References

- [https://helpx.adobe.com/security/products/substance3d-sampler/apsb26-121.html](https://helpx.adobe.com/security/products/substance3d-sampler/apsb26-121.html)

## Related threats

- [Adobe Substance 3D Sampler out-of-bounds write in file parsing](https://junglewise.ai/threats/cve-2026-83966-substance3d-sampler-is-affected-by-an-out-of-bounds-write)
- [Adobe Substance 3D Sampler stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-83965-substance3d-sampler-is-affected-by-a-stack-based-buffer-overflow)
- [Adobe Substance 3D Sampler out-of-bounds read](https://junglewise.ai/threats/cve-2026-100131-substance3d-sampler-is-affected-by-an-out-of-bounds-read)
- [Adobe Substance 3D Sampler out-of-bounds read in memory](https://junglewise.ai/threats/cve-2026-100130-substance3d-sampler-is-affected-by-an-out-of-bounds-read)
- [Adobe Substance3D Sampler heap buffer overflow](https://junglewise.ai/threats/cve-2026-83959-adobe-substance3d-sampler-heap-buffer-overflow)