# CVE-2026-34674: Adobe Substance3D Sampler heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-34674-adobe-substance3d-sampler-heap-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-27. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-34674 · Severity: high · CVSS 7.8 · Published 2026-08-27

Adobe Substance3D Sampler is a 3D material creation tool used by designers and artists. A heap buffer overflow vulnerability in versions 5.1.3 and earlier could allow an attacker to execute arbitrary code on a user's system if they open a malicious file, potentially compromising the user's account and data.

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

## Quick answers

**Is CVE-2026-34674 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34674 being exploited in the wild.

**How severe is CVE-2026-34674?** High severity, with a CVSS score of 7.8, published 27 August 2026.

**Which products and versions are affected?** Adobe Substance3D Sampler 5.1.3 and earlier.

**Is there a fix for CVE-2026-34674?** 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-2026-34674 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-34674?** Check whether you run Adobe Substance 3d Painter 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

A heap-based buffer overflow exists in Adobe Substance3D Sampler versions 5.1.3 and earlier. The vulnerability is triggered when the application processes a specially crafted input file, allowing an attacker to overflow a heap buffer and overwrite adjacent memory. Exploitation requires user interaction—the victim must open a malicious file. Successful exploitation results in arbitrary code execution in the context of the current user. No information on patch availability is provided in the advisory.

## Affected products

- Adobe Substance3D Sampler 5.1.3 and earlier

## Timeline

- 2026-08-27: disclosed

## References

- [https://helpx.adobe.com/security/products/substance3d-sampler/apsb26-54.html](https://helpx.adobe.com/security/products/substance3d-sampler/apsb26-54.html)

## Related threats

- [Adobe Substance 3D Painter out-of-bounds read in file parsing](https://junglewise.ai/threats/cve-2026-48380-substance3d-painter-is-affected-by-an-out-of-bounds-read)
- [Adobe Substance 3D Painter stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-48379-substance3d-painter-is-affected-by-a-stack-based-buffer-overflow)
- [Adobe Substance3D Sampler heap buffer overflow](https://junglewise.ai/threats/cve-2026-83959-adobe-substance3d-sampler-heap-buffer-overflow)
- [Adobe Substance3D Painter out-of-bounds write](https://junglewise.ai/threats/cve-2026-75770-adobe-substance3d-painter-out-of-bounds-write)
- [Adobe Substance 3D Painter heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-75769-adobe-substance-3d-painter-heap-based-buffer-overflow)