EUVD-2026-65645
GHSA-722c-v8j2-6qp9
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File-open trigger sets AV:L and UI:R; no privileges or special config needed (PR:N, AC:L); full user-context impact with no scope change.
Primary rating from Vendor (adobe).
CVSS VectorVendor: adobe
Lifecycle Timeline
2DescriptionCVE.org
Substance3D - Sampler is affected by an out-of-bounds write 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
Out-of-bounds write in Adobe Substance 3D Sampler enables arbitrary code execution within the context of the current user when a victim opens a specially crafted file. All versions are listed as affected per the wildcard CPE string, and the CVSS 7.8 High score reflects low-complexity exploitation once the file is opened, with full confidentiality, integrity, and availability impact. …
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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 Adobe Substance 3D Sampler - this is the sole prerequisite confirmed by the CVSS UI:R metric and the CVE description. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High score is well-calibrated for a file-parsing RCE: AV:L restricts the attack to the desktop context, AC:L confirms no special conditions beyond delivering the file, PR:N indicates no authentication is needed, and UI:R correctly gates exploitation on victim 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 vendor-released patch documented in Adobe Security Bulletin APSB26-121, available at 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 and restrict user ability to open untrusted files through access controls or application settings; communicate the risk to affected teams and advise against opening files from unknown sources. …
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Same weakness CWE-787 – Out-of-bounds Write
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External POC / Exploit Code
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