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Substance 3D Designer CVE-2026-48431

| EUVDEUVD-2026-65629 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-08-25 adobe GHSA-p3jj-j6cq-5j4p
7.8
CVSS 3.1 · Vendor: adobe
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Severity by source

Vendor (adobe) PRIMARY
7.8 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vuln.today AI
7.8 HIGH

File-parsing vector is local (AV:L); no attacker privileges needed to craft the file (PR:N); victim must open it (UI:R); full impact to vulnerable process (C/I/A:H).

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (adobe).

CVSS VectorVendor: adobe

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Aug 25, 2026 - 18:37 vuln.today
CVE Published
Aug 25, 2026 - 17:42 nvd
HIGH 7.8

DescriptionCVE.org

Substance3D - Designer is affected by a Heap-based Buffer Overflow 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.

AnalysisAI

Heap-based buffer overflow in Adobe Substance 3D Designer enables arbitrary code execution in the context of the victim user when a malicious project or asset file is opened. The CVSS vector (AV:L/AC:L/PR:N/UI:R) confirms local file-based exploitation with no privileges required on the attacker side, but requiring the victim to actively open a crafted file. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires the victim to actively open a specially crafted file in Adobe Substance 3D Designer - this is the sole prerequisite. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 7.8 score reflects a High-severity local file-parsing vulnerability with full C/I/A impact, but with a critical limiting factor: UI:R requires the victim to actively open a malicious file. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary fix is to apply the vendor patch identified in Adobe security advisory APSB26-115 (https://helpx.adobe.com/security/products/substance3d_designer/apsb26-115.html); the exact patched version number should be confirmed from that advisory. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Inventory all Substance 3D Designer deployments and restrict file imports to internally-created or established vendor sources; communicate risk to affected users with explicit guidance to avoid external files. …

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CVE-2026-48431 vulnerability details – vuln.today

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