EUVD-2026-65634
GHSA-cchq-mxq6-h6mg
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Local file-open trigger drives AV:L and UI:R; no system privileges needed (PR:N); full user-context code execution justifies C:H/I:H/A:H with unchanged scope.
Primary rating from Vendor (adobe).
CVSS VectorVendor: adobe
Lifecycle Timeline
2DescriptionCVE.org
Substance3D - Designer 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 Designer enables arbitrary code execution in the context of the current user when a malicious file is opened. The flaw (CWE-122) resides in the application's file parsing logic, allowing an attacker who can deliver a crafted Designer file to achieve full code execution without requiring any elevated privileges on the target 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 in Adobe Substance 3D Designer - this is the sole but essential precondition encoded in UI:R. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score is well-calibrated: AV:L reflects that exploitation is gated behind a file-open action (the malicious file must exist on the local filesystem or an accessible network path), while AC:L and PR:N correctly capture that once the file is delivered, no additional system privileges or complex preconditions are required. … 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 or updated version specified in Adobe Security Bulletin APSB26-115, available at https://helpx.adobe.com/security/products/substance3d_designer/apsb26-115.html. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all systems running Adobe Substance 3D Designer and restrict file imports to trusted internal sources only; communicate risk and interim controls to affected users. …
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External POC / Exploit Code
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