CVE-2025-24439 Overview
CVE-2025-24439 is a heap-based buffer overflow vulnerability affecting 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 malicious file. The vulnerability maps to [CWE-122] (Heap-based Buffer Overflow) and [CWE-787] (Out-of-bounds Write). Exploitation requires local user interaction, limiting remote weaponization but enabling targeted attacks through phishing or supply-chain delivery of malicious 3D asset files.
Critical Impact
Successful exploitation leads to arbitrary code execution with the privileges of the logged-in user, compromising confidentiality, integrity, and availability of the host.
Affected Products
- Adobe Substance 3D Sampler version 4.5.2
- All prior Adobe Substance 3D Sampler releases
- Windows and macOS installations of the affected product
Discovery Timeline
- 2025-03-11 - CVE-2025-24439 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-24439
Vulnerability Analysis
The vulnerability resides in the file parsing logic of Adobe Substance 3D Sampler. When the application processes a malformed asset file, it writes data beyond the bounds of an allocated heap buffer. This out-of-bounds write corrupts adjacent heap metadata and application objects. An attacker who controls the contents of the overflow can manipulate heap structures to redirect execution flow. The resulting condition allows arbitrary code execution within the user's security context. Because Substance 3D Sampler is used by 3D artists handling externally sourced assets, malicious files can reach victims through asset marketplaces, email attachments, or collaboration platforms.
Root Cause
The root cause is improper bounds checking during the deserialization of attacker-controlled fields in a supported file format. The parser allocates a fixed-size heap buffer based on assumed input dimensions but fails to validate the actual length of incoming data before copying it. This violates safe memory handling and triggers the heap corruption identified under [CWE-122] and [CWE-787].
Attack Vector
Exploitation requires local access and active user interaction. The attacker crafts a malicious project, scan, or material file and delivers it to the target. When the victim opens the file in Substance 3D Sampler, the parser processes the malicious payload and triggers the heap overflow. No elevated privileges are required to launch the attack, and the resulting code executes with the victim's user rights.
No verified public proof-of-concept code is available. Refer to the Adobe Security Advisory APSB25-16 for vendor technical details.
Detection Methods for CVE-2025-24439
Indicators of Compromise
- Unexpected child processes spawned by Adobe Substance 3D Sampler.exe, particularly command shells or scripting interpreters
- Crash dumps or Windows Error Reporting events referencing heap corruption in the Sampler process
- Inbound 3D asset files from untrusted sources opened immediately before anomalous endpoint activity
Detection Strategies
- Monitor process lineage for Substance 3D Sampler launching unsigned binaries, powershell.exe, cmd.exe, or rundll32.exe
- Alert on writes to user persistence locations such as Run registry keys or Startup folders originating from the Sampler process
- Inspect outbound network connections from the Sampler process, which under normal use does not initiate external communications
Monitoring Recommendations
- Enable application crash telemetry collection and correlate repeated Sampler crashes with file-open events
- Track file provenance for .sbs, .sbsar, and related project files arriving from email, browser downloads, or removable media
- Audit endpoints running outdated Substance 3D Sampler versions through software inventory tooling
How to Mitigate CVE-2025-24439
Immediate Actions Required
- Upgrade Adobe Substance 3D Sampler to the fixed release identified in Adobe Security Advisory APSB25-16
- Inventory all workstations with Substance 3D Sampler installed and prioritize patching for users handling external assets
- Instruct users to avoid opening Substance 3D Sampler files received from untrusted sources until patching completes
Patch Information
Adobe addressed CVE-2025-24439 in the security update referenced by advisory APSB25-16. Administrators should deploy the updated Substance 3D Sampler build through Adobe Creative Cloud or managed software distribution channels. Verify version strings after deployment to confirm the patched build is in use.
Workarounds
- Restrict opening of Substance 3D files to those originating from verified internal projects or trusted vendors
- Run Substance 3D Sampler under standard user accounts without administrative privileges to limit post-exploitation impact
- Apply application allowlisting to prevent the Sampler process from launching scripting engines or unsigned executables
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
