CVE-2025-49569: Adobe Substance 3D Viewer RCE Vulnerability

CVE-2025-49569 Overview

CVE-2025-49569 is an out-of-bounds write vulnerability [CWE-787] affecting Adobe Substance 3D Viewer versions 0.25 and earlier. Successful exploitation allows arbitrary code execution in the context of the current user. The flaw requires local access and user interaction, with a victim needing to open a malicious file crafted by an attacker.

Adobe addressed the issue in security advisory APSB25-72. The vulnerability carries a CVSS 3.1 base score of 7.8 and impacts confidentiality, integrity, and availability. No public proof-of-concept exploit is currently available, and CISA has not listed the CVE in the Known Exploited Vulnerabilities catalog.

Critical Impact

An attacker can achieve arbitrary code execution on a workstation after convincing a user to open a malicious Substance 3D Viewer file.

Affected Products

• Adobe Substance 3D Viewer version 0.25
• Adobe Substance 3D Viewer versions prior to 0.25
• Windows and macOS installations running the vulnerable Substance 3D Viewer build

Discovery Timeline

• 2025-08-12 - CVE-2025-49569 published to the National Vulnerability Database
• 2025-08-14 - Last updated in NVD database

Technical Details for CVE-2025-49569

Vulnerability Analysis

The vulnerability is an out-of-bounds write in Adobe Substance 3D Viewer, a 3D asset visualization tool used by designers and content creators. Out-of-bounds writes occur when an application writes data past the end, or before the beginning, of an allocated memory buffer. The condition typically arises from missing or incorrect bounds checks while parsing externally supplied data.

In this case, the unsafe write happens while processing a malicious file opened by the user. An attacker who controls the structure or content of that file can overwrite adjacent memory used by the application. Depending on the memory layout, this can corrupt function pointers, virtual table entries, or heap metadata.

Exploitation produces arbitrary code execution under the privileges of the user running Substance 3D Viewer. This typically translates to interactive user rights on the host, providing a foothold for credential theft, lateral movement, or staging of additional payloads.

Root Cause

The root cause is improper validation of input bounds during file parsing inside Substance 3D Viewer version 0.25 and earlier. A specially crafted asset file causes the application to write attacker-controlled bytes beyond the intended buffer, corrupting program memory.

Attack Vector

The attack vector is local and requires user interaction. An attacker delivers a malicious 3D asset, project, or scene file through email, chat, web download, or removable media. When the victim opens the file in Substance 3D Viewer, the parser triggers the out-of-bounds write and the attacker gains code execution.

The vulnerability mechanism is described in prose only. No public exploit, technical proof-of-concept, or sanitized code sample is available. Refer to the Adobe Security Advisory APSB25-72 for vendor-supplied technical context.

Detection Methods for CVE-2025-49569

Indicators of Compromise

• Unexpected child processes spawned by the Substance 3D Viewer executable, such as command shells, scripting hosts, or rundll32.exe.
• Substance 3D Viewer crashes or abnormal termination immediately after opening a 3D asset file received from an external source.
• Untrusted 3D model, scene, or texture files arriving by email, messaging platforms, or web download directories before viewer activity.
• New persistence entries, scheduled tasks, or outbound network connections established shortly after Substance 3D Viewer is launched.

Detection Strategies

• Hunt for process-lineage anomalies where Substance 3D Viewer becomes the parent of interpreters or living-off-the-land binaries.
• Correlate viewer process crashes with the file path of the document most recently opened to identify candidate malicious assets.
• Inspect endpoint detection and response (EDR) telemetry for memory protection violations and Data Execution Prevention (DEP) events originating from the viewer process.

Monitoring Recommendations

• Enable command-line and process-creation auditing on workstations where Substance 3D Viewer is installed.
• Forward viewer crash dumps and Windows Error Reporting events to a centralized log platform for triage.
• Monitor outbound network connections from creative workstations to flag post-exploitation command-and-control traffic.

How to Mitigate CVE-2025-49569

Immediate Actions Required

• Inventory all endpoints running Adobe Substance 3D Viewer and identify systems on version 0.25 or earlier.
• Apply the Adobe-released update referenced in advisory APSB25-72 to every affected installation.
• Restrict opening of Substance 3D asset files received from untrusted sources until patching is complete.
• Communicate the user-interaction risk to creative and design teams, who are the primary targets for this file-format attack.

Patch Information

Adobe published security advisory APSB25-72 with a fixed release of Substance 3D Viewer that resolves the out-of-bounds write. Administrators should deploy the updated version on all Windows and macOS endpoints. Full vendor guidance is available in the Adobe Security Advisory APSB25-72.

Workarounds

• Block delivery of untrusted Substance 3D file formats at the email gateway and web proxy where the application is not required.
• Run Substance 3D Viewer under a standard user account rather than an administrative account to limit post-exploitation impact.
• Apply application allowlisting to prevent the viewer from spawning interpreters or unsigned binaries.

# Configuration example: enumerate Substance 3D Viewer versions on Windows endpoints
Get-ItemProperty "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*" |
  Where-Object { $_.DisplayName -like "*Substance 3D Viewer*" } |
  Select-Object DisplayName, DisplayVersion, InstallLocation