EUVD-2026-65644
GHSA-q8w8-q9f3-7hhc
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File-open trigger confirms AV:L and UI:R; no authentication or special configuration needed beyond the malicious file, so PR:N and AC:L; full user-context impact with no scope change.
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
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 victim user when a malicious file is opened. The vulnerability carries a CVSS 7.8 (High) rating with full confidentiality, integrity, and availability impact on the vulnerable system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that a victim user open a specially crafted file using Adobe Substance 3D Sampler - no network-exposed service, no server-side processing, and no administrative privileges are involved. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects high impact with low attack complexity once user interaction is obtained, constrained by local scope and required file-open 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 | Consult Adobe security advisory APSB26-121 at https://helpx.adobe.com/security/products/substance3d-sampler/apsb26-121.html for the exact patched version and upgrade instructions; the specific fixed version is not resolvable from the available input data and must not be inferred. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, complete an inventory of all systems running Adobe Substance 3D Sampler and communicate a brief vulnerability advisory to affected users without specific attack vector details. …
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External POC / Exploit Code
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