CVE-2026-27276 – CVE-2026-27276 is a use-after-free vulnerabilit... (How to Fix)

Q: What is the severity of CVE-2026-27276?

CVE-2026-27276 has a CVSS score of 7.8 (HIGH). CVE-2026-27276 is a use-after-free vulnerability in Substance3D Stager that could allow arbitrary code execution when a user opens a malicious file. This affects users of Substance3D Stager versions 3.1.7 and earlier. Successful exploitation requires user interaction through opening a specially crafted file.

📋 TL;DR

CVE-2026-27276 is a use-after-free vulnerability in Substance3D Stager that could allow arbitrary code execution when a user opens a malicious file. This affects users of Substance3D Stager versions 3.1.7 and earlier. Successful exploitation requires user interaction through opening a specially crafted file.

💻 Affected Systems

Products:

Adobe Substance3D Stager

Versions: 3.1.7 and earlier

Operating Systems: Windows, macOS

Default Config Vulnerable: ⚠️ Yes

Notes: All default installations of affected versions are vulnerable. Requires user interaction to trigger via malicious file.

📦 What is this software?

Substance 3d Stager by Adobe

View all CVEs affecting Substance 3d Stager →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise with attacker gaining full control of the user's system and potentially pivoting to other systems.

🟠

Likely Case

Local privilege escalation leading to data theft, ransomware deployment, or persistence mechanisms installation.

🟢

If Mitigated

Limited impact with proper application sandboxing and user privilege restrictions preventing system-wide compromise.

🌐 Internet-Facing: LOW

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires user interaction (opening malicious file). No public exploit code available at this time.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 3.1.8 or later

Vendor Advisory: https://helpx.adobe.com/security/products/substance3d_stager/apsb26-29.html

Restart Required: Yes

Instructions:

1. Open Substance3D Stager. 2. Go to Help > Check for Updates. 3. Follow prompts to install version 3.1.8 or later. 4. Restart the application.

🔧 Temporary Workarounds

Restrict File Opening

all

Prevent users from opening untrusted Substance3D Stager files

Application Sandboxing

all

Run Substance3D Stager in restricted environment/sandbox

🧯 If You Can't Patch

Implement application control to block execution of vulnerable versions
Educate users about risks of opening untrusted Substance3D Stager files

🔍 How to Verify

Check if Vulnerable:

Check Substance3D Stager version in application settings or About dialog

Check Version:

Not applicable - check via application GUI

Verify Fix Applied:

Verify version is 3.1.8 or later in application settings

📡 Detection & Monitoring

Log Indicators:

Unexpected application crashes
Suspicious file opening events

Network Indicators:

Outbound connections after opening Substance3D files

SIEM Query:

EventID=4688 AND ProcessName LIKE '%Stager%' AND CommandLine LIKE '%.sbs%'

📊 Metadata

CVE ID: CVE-2026-27276

CVSS v3 Score: 7.8 (HIGH)

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

CWE: CWE-416

Published: March 10, 2026

Last Updated: March 11, 2026

🔗 References

https://helpx.adobe.com/security/products/substance3d_stager/apsb26-29.html Vendor Advisory

📤 Share & Export

📄 Export Markdown 📋 Export JSON

🔗 Related Vulnerabilities

If you're affected by CVE-2026-27276, you might also want to check these: