EUVD-2026-65688
GHSA-mjc4-h6xq-528p
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 access with active UI:R; PR:N because no authentication needed - only delivery of malicious file; full C/I/A impact from RCE within user context.
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 - Painter 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 Painter enables arbitrary code execution within the context of the current user when a victim opens a specially crafted malicious file. The CVSS 7.8 (High) score reflects local attack vector with no required privileges but mandatory user interaction, making social engineering the primary delivery mechanism for exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively open a specially crafted malicious file in Adobe Substance 3D Painter - this mandatory user interaction is confirmed by both the CVE description and the CVSS UI:R metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H scores 7.8 High, reflecting that exploitation is local (the malicious file must be opened on the victim's machine), complexity is low once the file is delivered, no privileges are required of the attacker, but user interaction is mandatory. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Substance 3D Painter project file embedding a heap overflow payload and distributes it to target users in a game studio or VFX house via email, a shared cloud asset repository, or a spoofed marketplace listing. When the victim opens the file in Substance 3D Painter, the heap buffer overflow is triggered during parsing, overwriting heap structures to redirect code execution to attacker-controlled instructions. … |
| Remediation | Apply the vendor-released patch as documented in Adobe security advisory APSB26-129 at https://helpx.adobe.com/security/products/substance3d_painter/apsb26-129.html - the exact patched version must be confirmed there, as no specific fix version was present in the available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of Adobe Substance 3D Painter installations across the organization, disable the application on non-essential systems, and restrict all file operations to internal trusted sources with mandatory briefing for creative staff on file-source verification. …
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External POC / Exploit Code
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