Out-of-Bounds Read Vulnerability in Substance3D Stager by Adobe
CVE-2026-21343

7.8HIGH

Key Information:

Vendor

Adobe
Status
Substance3d - Stager
Vendor
CVE Published:
10 February 2026

What is CVE-2026-21343?

Adobe Substance3D Stager versions 3.1.6 and earlier are susceptible to an out-of-bounds read vulnerability due to improper parsing of specially crafted files. This flaw allows attackers to read beyond the allocated memory structure, potentially leading to unauthorized code execution within the context of the current user. Successful exploitation of this vulnerability necessitates user engagement, as the victim must open a maliciously designed file.

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Affected Version(s)

Substance3D - Stager 0 <= 3.1.6

References

https://helpx.adobe.com/security/products/substance3d_sta...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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