Is CVE-2026-103838 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-103838 being exploited in the wild.

How severe is CVE-2026-103838?

High severity, with a CVSS score of 7.8, published 13 October 2026.

Which products and versions are affected?

Adobe Substance 3d Stager 3.1.8 and earlier.

Is there a fix for CVE-2026-103838?

Yes: fixed in Substance 3D Stager 3.1.9. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-103838 attacked?

It is attacked with local access, in a web application.

Am I affected by CVE-2026-103838?

Check whether you run Adobe Substance 3d Stager 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.

CVE-2026-103838: Adobe Substance 3D Stager out-of-bounds write vulnerability

CVE-2026-103838 · Severity: high · CVSS 7.8 · Published 2026-10-13

Adobe Substance 3D Stager is a 3D design and visualization tool used by creative professionals. Multiple out-of-bounds write vulnerabilities in the application could allow an attacker to execute arbitrary code with the privileges of the current user by tricking a victim into opening a specially crafted file. No exploits are currently known in the wild.

Technologies: Adobe Substance 3d Stager. Vendors: Adobe.

Quick answers

Is CVE-2026-103838 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-103838 being exploited in the wild.
How severe is CVE-2026-103838?: High severity, with a CVSS score of 7.8, published 13 October 2026.
Which products and versions are affected?: Adobe Substance 3d Stager 3.1.8 and earlier.
Is there a fix for CVE-2026-103838?: Yes: fixed in Substance 3D Stager 3.1.9. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-103838 attacked?: It is attacked with local access, in a web application.
Am I affected by CVE-2026-103838?: Check whether you run Adobe Substance 3d Stager 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.

How to fix

Fixed in: Substance 3D Stager 3.1.9

Technical details

The vulnerability is a classic out-of-bounds write (CWE-787) in Substance 3D Stager's file parsing logic that can be triggered by opening a malicious file. This requires user interaction and executes in the context of the current user's privileges. The advisory covers multiple related buffer overflow and memory corruption issues (CVE-2026-103838, CVE-2026-103839, CVE-2026-103837, CVE-2026-103836, CVE-2026-103835, CVE-2026-103834, CVE-2026-103833, CVE-2026-103832) that all result in arbitrary code execution.

Affected products

Adobe Substance 3D Stager 3.1.8 and earlier

Timeline

2026-10-13: disclosed

References

https://www.adobe.com/trust/security/products/substance3d-stager/apsb26-170.html

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