Quick answers
- Is CVE-2026-103839 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103839 being exploited in the wild.
- How severe is CVE-2026-103839?
- 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-2026-103839?
- 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-2026-103839 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-103839?
- 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 advisory discloses 16 memory safety vulnerabilities across multiple categories: out-of-bounds writes (CWE-787), out-of-bounds reads (CWE-125), use-after-free (CWE-416), and stack-based buffer overflows (CWE-121). All require local attack vector with user interaction to open a malicious file and affect versions 3.1.8 and earlier on Windows and macOS. Exploitation results in arbitrary code execution in the context of the current user; a patch is available in version 3.1.9.
Affected products
- Adobe Substance 3D Stager 3.1.8 and earlier
Timeline
- 2026-10-13: disclosed