Quick answers
- Is CVE-2026-21342 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-21342 being exploited in the wild.
- How severe is CVE-2026-21342?
- High severity, with a CVSS score of 7.8, published 10 February 2026.
- Which products and versions are affected?
- Adobe Substance3D Stager 3.1.6 and earlier.
- Is there a fix for CVE-2026-21342?
- 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-2026-21342 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-21342?
- Check whether you run Adobe Substance 3d Stager, Adobe Substance3D Stager, Apple macOS or one of the others listed 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
The vulnerability is an out-of-bounds write (CWE-787) that occurs in Substance3D Stager versions 3.1.6 and earlier. The flaw allows arbitrary code execution in the context of the current user. Exploitation requires user interaction—specifically, a victim must open a malicious file. The attack vector is local, initiated through file handling. An attacker can achieve arbitrary code execution with the privileges of the user running the application. Adobe has issued patches; users should update to versions later than 3.1.6.
Affected products
- Adobe Substance3D Stager 3.1.6 and earlier
Timeline
- 2026-02-10: disclosed