# CVE-2026-34675: Adobe Substance 3D Painter out-of-bounds write

Source: https://junglewise.ai/threats/cve-2026-34675-adobe-substance-3d-painter-out-of-bounds-write  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-12. Updated: 2026-05-14  
License: CC BY 4.0 with a link back

CVE-2026-34675 · Severity: high · CVSS 7.8 · Published 2026-05-12

Adobe Substance 3D Painter, a professional 3D texturing and painting application, is affected by a security flaw that could allow an attacker to take control of a user's computer. To exploit this, an attacker must trick a user into opening a specially crafted malicious file. Successful exploitation could lead to unauthorized software execution, data theft, or complete system compromise in the context of the logged-in user.

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

## Quick answers

**Is CVE-2026-34675 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34675 being exploited in the wild.

**How severe is CVE-2026-34675?** High severity, with a CVSS score of 7.8, published 12 May 2026.

**Which products and versions are affected?** Adobe Substance 3d Painter 12.0.2 and earlier.

**Is there a fix for CVE-2026-34675?** 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-2026-34675 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-34675?** Check whether you run Adobe Substance 3d Painter 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

An out-of-bounds write vulnerability (CWE-787) exists in Adobe Substance 3D Painter versions 12.0.2 and earlier. The flaw is triggered when the application processes a specially crafted file, leading to memory corruption. An attacker can leverage this to execute arbitrary code with the privileges of the current user. Exploitation requires local delivery of a malicious file and user interaction (opening the file). Adobe has addressed this in version 12.0.3.

## Affected products

- Adobe Substance 3D Painter 12.0.2 and earlier

## Timeline

- 2026-05-12: disclosed
- 2026-05-12: advisory: Adobe released security bulletin APSB26-55

## References

- [https://helpx.adobe.com/security/products/substance3d_painter/apsb26-55.html](https://helpx.adobe.com/security/products/substance3d_painter/apsb26-55.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-2026-34674-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)