Quick answers
- Is CVE-2026-21335 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-21335 being exploited in the wild.
- How severe is CVE-2026-21335?
- High severity, with a CVSS score of 7.8, published 10 February 2026.
- Which products and versions are affected?
- Adobe Substance3D Designer 15.1.0 and earlier.
- Is there a fix for CVE-2026-21335?
- 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-2026-21335 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-21335?
- Check whether you run Adobe Substance 3d Designer or Adobe Substance3D Designer 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 (heap buffer overflow) in Substance3D Designer versions 15.1.0 and earlier. The flaw is triggered when processing maliciously crafted input files, allowing an attacker to write memory beyond the intended buffer boundaries. Exploitation requires user interaction—specifically, a victim must open a malicious file. Successful exploitation leads to arbitrary code execution in the context of the current user with no additional privileges required. Patches should be available from Adobe; update to version 15.1.1 or later.
Affected products
- Adobe Substance3D Designer 15.1.0 and earlier
Timeline
- 2026-02-10: disclosed