CVE-2025-27173: Adobe Substance 3D Modeler Buffer Overflow

CVE-2025-27173 Overview

CVE-2025-27173 is a heap-based buffer overflow vulnerability [CWE-122] affecting Adobe Substance 3D Modeler versions 1.15.0 and earlier. The flaw allows arbitrary code execution in the context of the current user when a victim opens a malicious file. Exploitation requires user interaction, limiting opportunistic attacks but enabling targeted social engineering campaigns against 3D design teams. Adobe addressed the issue in security advisory APSB25-21.

Critical Impact
Successful exploitation results in arbitrary code execution with the privileges of the logged-in user, enabling attackers to install malware, steal data, or pivot into enterprise environments through compromised design workstations.

Affected Products

Adobe Substance 3D Modeler version 1.15.0
Adobe Substance 3D Modeler all prior versions
Windows and macOS installations of the affected product

Discovery Timeline

2025-03-11 - CVE-2025-27173 published to NVD
2025-03-11 - Adobe releases security advisory APSB25-21
2025-04-18 - Last updated in NVD database

Technical Details for CVE-2025-27173

Vulnerability Analysis

The vulnerability is a heap-based buffer overflow in Adobe Substance 3D Modeler's file parsing logic. When the application processes a crafted 3D model or project file, it writes data past the bounds of a heap-allocated buffer. This memory corruption corrupts adjacent heap metadata or object pointers, providing an attacker with the primitives needed for control-flow hijacking.

Because the issue is classified under [CWE-122], the overflow occurs in dynamically allocated memory rather than the stack. Attackers typically leverage heap spraying or grooming techniques to align attacker-controlled data with the corruption point. Successful exploitation results in arbitrary code execution at the privilege level of the user running the application.

Root Cause

The root cause is improper validation of size parameters or element counts during deserialization of untrusted file content. The parser allocates a buffer based on one value and writes data based on another, allowing the write to exceed the allocation. Adobe has not published technical details on the specific file format component triggering the overflow.

Attack Vector

The attack vector is local and requires user interaction. An attacker delivers a malicious Substance 3D Modeler project file through email, messaging platforms, supply chain channels, or compromised asset marketplaces. When the victim opens the file in a vulnerable version of Modeler, the overflow triggers and executes embedded shellcode in the user's session context.

No verified proof-of-concept code is publicly available for this vulnerability. Refer to the Adobe Security Advisory APSB25-21 for vendor-provided technical context.

Detection Methods for CVE-2025-27173

Indicators of Compromise

Unexpected child processes spawned by Substance 3D Modeler.exe such as cmd.exe, powershell.exe, or rundll32.exe
Crashes or unexpected termination of Substance 3D Modeler when opening third-party project files
Outbound network connections originating from the Modeler process to non-Adobe infrastructure
New persistence artifacts created in user profile directories shortly after opening a model file

Detection Strategies

Apply behavioral detection rules that flag code execution descending from creative application processes
Monitor for memory protection violations and access violation crash events linked to Modeler
Hunt for Substance 3D Modeler project files (.sbsm) arriving via email gateways from unverified senders
Correlate file-open events with subsequent process creation chains to identify weaponized assets

Monitoring Recommendations

Enable EDR telemetry on workstations used by 3D artists, design teams, and gaming studios
Collect Windows Event ID 4688 and Sysmon Event ID 1 for process creation auditing
Log file modifications in user AppData and Temp directories during Modeler sessions
Track outbound DNS and HTTPS connections from creative software processes

How to Mitigate CVE-2025-27173

Immediate Actions Required

Update Adobe Substance 3D Modeler to the version specified in Adobe advisory APSB25-21
Inventory all endpoints with Substance 3D Modeler installed and prioritize patching
Restrict opening of Modeler project files received from external or untrusted sources
Brief design teams on the social engineering risk associated with malicious 3D assets

Patch Information

Adobe released a fixed version of Substance 3D Modeler addressing this issue. Administrators should review the Adobe Security Advisory APSB25-21 for the exact patched version and download links. Deploy the update through standard software distribution tooling and verify installation on all affected hosts.

Workarounds

Block delivery of Substance 3D project files at email and web gateways for users who do not require them
Run Modeler under a standard user account to limit the blast radius of successful exploitation
Open untrusted 3D assets only in an isolated virtual machine or sandboxed environment
Apply application allowlisting to prevent unexpected child processes from spawning under Modeler

bash

# Verify installed Substance 3D Modeler version on Windows
reg query "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall" /s /f "Substance 3D Modeler"

# Verify installed version on macOS
defaults read "/Applications/Adobe Substance 3D Modeler.app/Contents/Info.plist" CFBundleShortVersionString