CVE-2026-21344
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 read vulnerability when parsing a crafted file, which could result in a read past the end of an allocated memory structure. An attacker could leverage this vulnerability to execute code in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Analysis
Substance 3D Stager 3.1.6 and earlier contains an out-of-bounds read vulnerability in file parsing that allows arbitrary code execution when a victim opens a malicious crafted file. The vulnerability affects local users and requires user interaction to exploit, making social engineering a viable attack vector. …
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Remediation
Within 24 hours: Identify all instances of Substance3D Stager in use and document affected versions. Within 7 days: Implement file input restrictions, restrict file upload sources to trusted channels, and disable auto-file processing features where possible. …
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External POC / Exploit Code
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