CVE-2025-24444: Adobe Substance 3D Sampler RCE Vulnerability

CVE-2025-24444 Overview

CVE-2025-24444 is an out-of-bounds write vulnerability [CWE-787] in Adobe Substance 3D Sampler versions 4.5.2 and earlier. The flaw allows arbitrary code execution in the context of the current user when a victim opens a crafted file. Adobe published the issue on March 11, 2025 and addressed it in security bulletin APSB25-16.

The vulnerability requires local access and user interaction, limiting remote exploitation paths. However, attackers can deliver malicious sampler project files through email, file sharing, or compromised asset repositories to trigger the flaw.

Critical Impact

Successful exploitation grants arbitrary code execution with the privileges of the user running Substance 3D Sampler.

Affected Products

• Adobe Substance 3D Sampler 4.5.2 and earlier (Windows)
• Adobe Substance 3D Sampler 4.5.2 and earlier (macOS)
• All prior 4.x release branches of Substance 3D Sampler

Discovery Timeline

• 2025-03-11 - CVE-2025-24444 published to NVD
• 2025-03-11 - Adobe releases security bulletin APSB25-16
• 2025-04-01 - Last updated in NVD database

Technical Details for CVE-2025-24444

Vulnerability Analysis

The vulnerability is an out-of-bounds write [CWE-787] in the file parsing logic of Adobe Substance 3D Sampler. When the application processes a malformed sampler asset, it writes data past the bounds of an allocated buffer. This memory corruption enables an attacker to overwrite adjacent structures, function pointers, or return addresses on the stack or heap.

An attacker can leverage this primitive to redirect execution flow and run arbitrary code under the active user account. The integrity, confidentiality, and availability impacts are all high because the attacker inherits full user privileges.

Substance 3D Sampler handles complex texture, material, and 3D scene formats. File format parsers that lack strict boundary validation are a recurring source of memory corruption issues in creative software. The lack of sandboxing around file parsing increases the practical risk of exploitation.

Root Cause

The root cause is insufficient bounds checking when parsing attacker-controlled data inside a sampler asset file. The parser computes or trusts a size field without validating it against the destination buffer size before issuing a write operation. Adobe has not published technical specifics about the affected file format or routine.

Attack Vector

Exploitation requires local access and user interaction. The victim must download and open a malicious file in Substance 3D Sampler. Typical delivery channels include phishing attachments, drive-by downloads, shared 3D asset libraries, and supply chain compromise of project files. No exploit code is publicly available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

For technical details, refer to the Adobe Security Bulletin APSB25-16.

Detection Methods for CVE-2025-24444

Indicators of Compromise

• Substance 3D Sampler (Adobe Substance 3D Sampler.exe) spawning unexpected child processes such as cmd.exe, powershell.exe, or bash
• Unexpected outbound network connections originating from the Substance 3D Sampler process
• New executable or script files written to user-writable directories shortly after opening a sampler asset file
• Crashes or repeated faults logged for Substance 3D Sampler when opening untrusted files

Detection Strategies

• Monitor process lineage for Substance 3D Sampler launching shells, scripting interpreters, or LOLBins
• Alert on Substance 3D Sampler writing to autostart locations, scheduled task paths, or system directories
• Inspect endpoint crash telemetry and Windows Error Reporting events tied to the Sampler process
• Hunt for sampler project files (.sbs, .sbsar, .ssa) arriving via email gateways or external file shares

Monitoring Recommendations

• Track installed versions of Adobe Substance 3D Sampler across endpoints and flag versions at or below 4.5.2
• Centralize endpoint process and file telemetry to enable behavioral hunting around creative-suite applications
• Correlate user-opened file events with subsequent process and network activity from creative tools

How to Mitigate CVE-2025-24444

Immediate Actions Required

• Upgrade Adobe Substance 3D Sampler to the fixed version listed in Adobe Security Bulletin APSB25-16
• Inventory all workstations running Substance 3D Sampler and prioritize patching for users handling external assets
• Instruct users to avoid opening sampler files received from untrusted sources or unsolicited messages
• Restrict execution of Substance 3D Sampler to standard user accounts rather than administrators

Patch Information

Adobe addressed CVE-2025-24444 in the update described in APSB25-16. Apply the vendor-supplied update through the Adobe Creative Cloud desktop application or the Adobe enterprise deployment tools. Confirm the installed version is later than 4.5.2 after patching.

Workarounds

• Block delivery of unsolicited Substance 3D Sampler file types at email and web gateways until patching is complete
• Run Substance 3D Sampler under a non-privileged account to limit the blast radius of code execution
• Use application allowlisting to prevent child process execution from creative software

# Verify installed Substance 3D Sampler version on Windows (PowerShell)
Get-ItemProperty "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*" |
  Where-Object { $_.DisplayName -like "*Substance 3D Sampler*" } |
  Select-Object DisplayName, DisplayVersion, Publisher