CVE-2026-34674 Substance3D - Sampler | Heap-based Buffer Overflow (CWE-122)

High 7.8 Published 27 Aug 2026 Updated 27 Aug 2026

Heap-based buffer overflow in Substance 3D Sampler allows arbitrary code execution when a user opens a malicious file.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-34674?

CVE-2026-34674 is a high-severity memory corruption vulnerability in Adobe Substance 3d Painter, published on 27 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Substance3D - Sampler versions 5.1.3 and earlier are affected by a Heap-based Buffer Overflow vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Weakness: CWE-122

Which versions are affected by CVE-2026-34674?

It affects 1 product.

Products include Adobe Substance 3d Painter.

How do I fix CVE-2026-34674?

No fix has been published for CVE-2026-34674 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-34674 being exploited?

There is no known exploitation of CVE-2026-34674 in the wild and no public exploit code.

All Adobe Substance 3d Painter vulnerabilities

Sources

Also known as GHSA-fx85-8fxq-hjg3.