CVE-2026-103839 Substance3D - Stager | Out-of-bounds Write (CWE-787)
An out-of-bounds write in Adobe Substance 3D Stager 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-2026-103839?
CVE-2026-103839 is a high-severity memory corruption vulnerability in Adobe Substance 3d Stager, published on 13 Oct 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 - Stager is affected by an out-of-bounds write 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-787
Which versions are affected by CVE-2026-103839?
It affects 1 product.
Products include Adobe Substance 3d Stager.
How do I fix CVE-2026-103839?
No fix has been published for CVE-2026-103839 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-2026-103839 being exploited?
There is no known exploitation of CVE-2026-103839 in the wild and no public exploit code.
Other vulnerabilities in Adobe Substance 3d Stager
- CVE-2026-103830 Substance3D - Stager | Stack-based Buffer Overflow (CWE-121)
- CVE-2026-103832 Substance3D - Stager | Out-of-bounds Write (CWE-787)
- CVE-2026-103833 Substance3D - Stager | Out-of-bounds Write (CWE-787)
- CVE-2026-103834 Substance3D - Stager | Out-of-bounds Write (CWE-787)
- CVE-2026-103835 Substance3D - Stager | Out-of-bounds Write (CWE-787)
Sources
Also known as GHSA-f2pp-47jv-qvx3.