CVE-2025-24445: Adobe Substance 3D Sampler RCE Flaw

CVE-2025-24445 Overview

CVE-2025-24445 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 fix in security bulletin APSB25-16 on March 11, 2025.

Exploitation requires user interaction. An attacker must convince a target to open a malicious sampler project or asset file. No network access or prior privileges are required on the victim machine.

Critical Impact

Successful exploitation grants arbitrary code execution under the victim's user account, enabling malware installation, credential theft, or pivoting into corporate environments where Substance 3D Sampler is used by design and creative teams.

Affected Products

• Adobe Substance 3D Sampler 4.5.2 and earlier on Windows
• Adobe Substance 3D Sampler 4.5.2 and earlier on macOS
• Workstations used by design, gaming, and VFX teams that process untrusted 3D assets

Discovery Timeline

• 2025-03-11 - Adobe releases security patch via bulletin APSB25-16
• 2025-03-11 - CVE-2025-24445 published to the National Vulnerability Database (NVD)
• 2025-04-01 - Last updated in NVD database

Technical Details for CVE-2025-24445

Vulnerability Analysis

The vulnerability is an out-of-bounds write [CWE-787] in the file parsing logic of Substance 3D Sampler. When the application processes a malformed input file, it writes data past the allocated buffer boundary. The overflow corrupts adjacent memory structures, including function pointers or object metadata, that the application later dereferences.

The attack vector is local and requires user interaction. The vulnerability does not cross a privilege boundary on its own, so code executes with the privileges of the user running Sampler. On systems where designers operate with elevated rights or where the workstation holds source code, build credentials, or cloud tokens, the impact extends well beyond the user session.

No public proof-of-concept exploit is available, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS probability remains low, but file-format vulnerabilities in creative tooling are frequently weaponized through spear-phishing against media, gaming, and advertising studios.

Root Cause

The root cause is missing or incorrect bounds validation in a file format parser. Length or offset values read from attacker-controlled input are trusted without verification against the destination buffer size. Adobe has not published parser-level details beyond the APSB25-16 advisory.

Attack Vector

An attacker crafts a malicious Substance 3D Sampler project, scan, or texture file and delivers it via email, shared drive, asset marketplace, or compromised supplier. The victim opens the file in Sampler, the parser triggers the out-of-bounds write, and the corrupted memory is used to redirect execution into attacker-controlled shellcode.

The vulnerability mechanism is described in prose only. No verified public exploit code exists. See the Adobe Security Advisory APSB25-16 for vendor-confirmed details.

Detection Methods for CVE-2025-24445

Indicators of Compromise

• Substance 3D Sampler (Adobe Substance 3D Sampler.exe) spawning unexpected child processes such as cmd.exe, powershell.exe, wscript.exe, or bash
• Sampler process crashes followed by suspicious binary writes to %TEMP%, %APPDATA%, or user profile directories
• Outbound network connections originating from the Sampler process to unfamiliar hosts shortly after a project file is opened
• Sampler project files (.sbs, .sbsar, scan archives) arriving from external email or untrusted asset sources

Detection Strategies

• Endpoint Detection and Response (EDR) rules that alert when creative applications launch shells, scripting hosts, or LOLBins
• Behavioral detection of process injection or memory protection changes originating from Substance 3D Sampler
• Email and web gateway inspection for Substance project files arriving from external senders

Monitoring Recommendations

• Inventory all hosts running Substance 3D Sampler and track installed versions against 4.5.3 or later
• Forward Sampler process telemetry, child-process events, and file-write events to the SIEM for correlation
• Monitor crash telemetry from Substance 3D Sampler, since exploit attempts often produce parser crashes before succeeding

How to Mitigate CVE-2025-24445

Immediate Actions Required

• Upgrade Adobe Substance 3D Sampler to the version listed in APSB25-16 on all Windows and macOS workstations
• Block inbound Substance project and scan files from external senders at the email gateway pending patch deployment
• Instruct design and 3D teams to open assets only from trusted, internal sources until patching is verified
• Verify that affected users do not run with local administrator rights to limit post-exploitation impact

Patch Information

Adobe addressed CVE-2025-24445 in the update referenced by security bulletin APSB25-16, published March 11, 2025. Apply the update through the Adobe Creative Cloud desktop application or through managed deployment tooling. Confirm the installed version is above 4.5.2 after patching.

Workarounds

• No vendor-supplied workaround exists. Patching is the only supported remediation.
• Restrict execution of Substance 3D Sampler via application allow-listing on hosts that do not require the software
• Open suspect Substance files only inside isolated virtual machines or sandboxed analysis environments

# 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

# macOS: check bundle version
defaults read "/Applications/Adobe Substance 3D Sampler/Adobe Substance 3D Sampler.app/Contents/Info.plist" CFBundleShortVersionString