What is CVE-2026-21287?

CVE-2026-21287 is a high-severity vulnerability in Adobe Substance3d - Stager, classified under Use After Free. CVSS score: 7.8/10. Published 2026-01-13.

How severe is CVE-2026-21287?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Adobe Substance3d - Stager

CVE-2026-21287

Substance3D - Stager versions 3.1.5 and earlier are affected by a Use After Free 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…

Vulnerability class: Use-After-Free

EPSS: 0.001 (19.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Adobe Substance3d - Stager — versions 0

Weakness classification (CWE)

CWE-416 — Use After Free

References

helpx.adobe.com/security/products/substance3d_stager/apsb26-09.html (vendor-advisory)

Frequently asked questions

What is CVE-2026-21287?: CVE-2026-21287 is a high-severity vulnerability in Adobe Substance3d - Stager, classified under Use After Free. CVSS score: 7.8/10. Published 2026-01-13.
How severe is CVE-2026-21287?: High severity. CVSS v3 base score is 7.8 out of 10.