CVE-2026-21341
HIGHCVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2Description
Substance3D - Stager versions 3.1.6 and earlier are affected by an out-of-bounds write 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 victim must open a malicious file.
Analysis
Arbitrary code execution in Substance 3D Stager 3.1.6 and earlier via an out-of-bounds write vulnerability allows local attackers to execute arbitrary code with user privileges when a victim opens a malicious file. The vulnerability requires user interaction but no special privileges, making it practical to exploit through social engineering. …
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Remediation
Within 24 hours: Inventory all Substance3D Stager installations and identify affected versions (3.1.6 and earlier). Within 7 days: Implement user awareness training prohibiting opening files from untrusted sources and restrict file sharing mechanisms where feasible. …
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