EUVD-2026-65640
GHSA-v6h6-x6xw-wjgj
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File-parsing flaw requires local file open (AV:L, UI:R); no attacker privileges needed; full code execution yields C:H/I:H/A:H with unchanged scope.
Primary rating from Vendor (adobe).
CVSS VectorVendor: adobe
Lifecycle Timeline
2DescriptionCVE.org
Substance3D - Sampler 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 Sampler enables arbitrary code execution in the context of the authenticated local user when a victim opens a specially crafted malicious file. The vulnerability carries a CVSS 3.1 score of 7.8 (High), with full confidentiality, integrity, and availability impact on the affected system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively open a malicious file using Substance 3D Sampler - this is the sole prerequisite, as reflected in the CVSS UI:R metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 with vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H accurately reflects the risk profile: the attack vector is local (the malicious file must be opened on the victim's machine), complexity is low once the file is delivered, and no attacker privileges are required on the target system - only the victim's interaction. … 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 remediation is to apply the patch referenced in Adobe Security Bulletin APSB26-121 (https://helpx.adobe.com/security/products/substance3d-sampler/apsb26-121.html). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running Adobe Substance 3D Sampler, communicate to affected users to reject files from untrusted external sources, and assess the business-critical status of the application. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
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External POC / Exploit Code
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