EUVD-2026-65689
GHSA-pf24-3c8q-75h5
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File must be opened by victim (AV:L, UI:R); no credentials needed to craft or deliver the payload (PR:N); successful exploitation yields full user-context code execution across all three impact pillars (C:H/I:H/A:H) without 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 - 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 under the logged-in user's context when a victim opens a specially crafted malicious file. The vulnerability (CWE-122) affects all tracked versions per the wildcard CPE, with Adobe acknowledging the issue via advisory APSB26-129. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that a victim user actively open a malicious file in Adobe Substance 3D Painter - the CVSS UI:R metric confirms this mandatory user interaction as a hard prerequisite. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects a local, file-triggered attack requiring no special privileges but mandatory user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Substance Painter project file or supported import format containing oversized or malformed data engineered to overflow the heap buffer in the application's file parser. The file is delivered to a target artist or technical director via email, a shared collaboration platform, or a contractor file-exchange workflow under the guise of a legitimate project asset. … |
| Remediation | The primary remediation is to apply the vendor-released patch documented in Adobe advisory APSB26-129 (https://helpx.adobe.com/security/products/substance3d_painter/apsb26-129.html); the exact patched version must be confirmed directly from that advisory, as it is not reproduced in the available CVE input. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all machines running Adobe Substance 3D Painter and issue an urgent directive prohibiting users from opening design files (.spp and related project formats) from unverified external sources; implement file-type blocking at email gateways for these formats. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
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External POC / Exploit Code
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