CVE-2025-23402: Siemens Teamcenter Use-After-Free Flaw

CVE-2025-23402 Overview

CVE-2025-23402 is a use-after-free vulnerability [CWE-416] affecting Siemens Teamcenter Visualization and Tecnomatix Plant Simulation. The flaw resides in the WRL (VRML) file parser used by both product families. An attacker who convinces a user to open a crafted WRL file can trigger memory reuse after free and execute code in the context of the current process.

Siemens published advisory SSA-050438 and released fixed versions for all affected product lines. The vulnerability carries a CVSS v4.0 base score of 7.3 and requires local access combined with user interaction.

Critical Impact
Successful exploitation allows arbitrary code execution in the context of the user running the application, potentially exposing engineering data and providing a foothold into industrial design environments.

Affected Products

Teamcenter Visualization V14.3 (versions < V14.3.0.13), V2312 (< V2312.0009), V2406 (< V2406.0007), V2412 (< V2412.0002)
Tecnomatix Plant Simulation V2302 (versions < V2302.0021)
Tecnomatix Plant Simulation V2404 (versions < V2404.0010)

Discovery Timeline

2025-03-11 - CVE-2025-23402 published to NVD
2025-09-23 - Last updated in NVD database

Technical Details for CVE-2025-23402

Vulnerability Analysis

The vulnerability is a use-after-free condition triggered while parsing WRL files. WRL is the file format used by the Virtual Reality Modeling Language (VRML), commonly consumed by visualization and simulation tools to render 3D scene data. The parser frees an object while a reference to that memory remains in use, allowing subsequent operations to access freed heap memory.

When the freed allocation is reclaimed and populated with attacker-controlled data, the dangling reference operates on attacker-shaped memory. This typically enables corruption of object metadata, virtual function pointers, or other control structures used by the parser. The end result is arbitrary code execution within the process that loaded the file.

Because both Teamcenter Visualization and Tecnomatix Plant Simulation share the affected parsing logic, the vulnerability spans multiple product lines and version trains.

Root Cause

The root cause is improper object lifetime management in the WRL parser. A heap allocation referenced by parser state is released before all references are retired, leaving a dangling pointer that is later dereferenced during continued parsing.

Attack Vector

Exploitation requires local user interaction. An attacker delivers a malicious WRL file through email, shared engineering repositories, or supply-chain content. When a user opens the file in an affected version of Teamcenter Visualization or Tecnomatix Plant Simulation, the parser triggers the use-after-free and executes attacker-controlled code with the privileges of the current user.

The vulnerability does not require network access or elevated privileges, but it does require a user to open the crafted file. No public proof-of-concept or in-the-wild exploitation has been reported. See the Siemens Security Advisory SSA-050438 for vendor technical details.

Detection Methods for CVE-2025-23402

Indicators of Compromise

Unexpected .wrl or .vrml files arriving via email attachments, shared drives, or external engineering content packages
Crashes or abnormal termination of TcVis.exe or Plant Simulation processes shortly after opening a 3D model
Child processes such as cmd.exe, powershell.exe, or rundll32.exe spawned by Teamcenter Visualization or Tecnomatix Plant Simulation
Outbound network connections originating from visualization or simulation processes that normally operate offline

Detection Strategies

Hunt for process lineage where Teamcenter Visualization or Plant Simulation binaries spawn shell, scripting, or LOLBin processes
Inspect file ingest pipelines and engineering data repositories for newly introduced WRL files from untrusted sources
Correlate application crash events in the Windows Event Log with subsequent file or registry modifications by the same user account

Monitoring Recommendations

Monitor execution and module-load events for the Siemens Teamcenter and Tecnomatix binaries on engineering workstations
Alert on memory access violations and exception events generated by the affected applications
Track version inventory across endpoints to confirm patched builds are deployed and unpatched hosts are remediated

How to Mitigate CVE-2025-23402

Immediate Actions Required

Update Teamcenter Visualization to V14.3.0.13, V2312.0009, V2406.0007, or V2412.0002 as applicable
Update Tecnomatix Plant Simulation to V2302.0021 or V2404.0010 as applicable
Restrict opening of WRL files to those received from trusted, verified sources
Apply application allowlisting and least-privilege user rights on engineering workstations

Patch Information

Siemens has released fixed versions across all affected product trains. Refer to Siemens Security Advisory SSA-050438 for the complete list of fixed versions and download locations. Organizations should validate patch deployment through software inventory tooling.

Workarounds

Avoid opening untrusted WRL or VRML files until patches are applied
Block inbound WRL file attachments at the email gateway when feasible
Run affected applications under standard user accounts rather than administrative accounts to limit impact of successful exploitation
Segment engineering workstations from general-purpose corporate networks to contain post-exploitation movement

bash

# Configuration example: block .wrl attachments at a Postfix gateway
# /etc/postfix/mime_header_checks
/name=[^>]*\.(wrl|vrml)/  REJECT WRL attachments blocked pending CVE-2025-23402 remediation