CVE-2025-7228 Overview
CVE-2025-7228 is an out-of-bounds write vulnerability in INVT VT-Designer, a human-machine interface (HMI) design tool used in industrial control environments. The flaw resides in the parsing logic for PM3 project files. Attackers can leverage the vulnerability to execute arbitrary code in the context of the current process. Exploitation requires user interaction, where the target must open a malicious PM3 file or visit a malicious page that delivers one. The issue was reported through the Zero Day Initiative as ZDI-CAN-25571 and tracked under advisory ZDI-25-479. The weakness is classified as [CWE-787] Out-of-Bounds Write.
Critical Impact
Successful exploitation grants arbitrary code execution on engineering workstations running INVT VT-Designer, providing a foothold into industrial control system environments.
Affected Products
- INVT VT-Designer version 2.1.13
- Engineering workstations parsing INVT PM3 project files
- Industrial control environments using INVT HMI tooling
Discovery Timeline
- 2025-07-21 - CVE-2025-7228 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-7228
Vulnerability Analysis
The vulnerability exists in the PM3 file parser within INVT VT-Designer. When the application loads a crafted PM3 file, it fails to validate user-supplied data before writing into an allocated data structure. The parser writes past the end of the buffer, corrupting adjacent memory. An attacker controlling the malformed fields can shape memory to redirect execution flow. The result is arbitrary code execution under the privileges of the user running VT-Designer.
Because VT-Designer is typically installed on engineering workstations that interact with operational technology assets, code execution on these hosts is a meaningful pivot point. Compromise can enable lateral movement to programmable logic controllers (PLCs) and HMIs, as well as tampering with project files distributed to plant floor devices.
Root Cause
The root cause is insufficient bounds checking during deserialization of structured fields within PM3 files. The parser trusts size and offset values from the file without enforcing constraints against the destination buffer length. This pattern is consistent with [CWE-787] Out-of-Bounds Write.
Attack Vector
The attack requires local user interaction. An attacker delivers a malicious PM3 file through email attachments, shared engineering repositories, USB media, or web downloads. When an engineer opens the file in VT-Designer, the parser triggers the out-of-bounds write and the attacker's payload executes. The CVSS vector indicates a local attack with low complexity and no required privileges, but it relies on the target opening the file.
No public proof-of-concept exploit code is available. The vulnerability has not been listed in the CISA Known Exploited Vulnerabilities catalog. See the Zero Day Initiative Advisory ZDI-25-479 for additional vendor coordination details.
Detection Methods for CVE-2025-7228
Indicators of Compromise
- Unexpected PM3 files arriving over email, chat, or removable media on engineering workstations
- VT-Designer processes spawning child processes such as cmd.exe, powershell.exe, or rundll32.exe
- Crash events or Windows Error Reporting entries referencing the VT-Designer process during file open operations
- Outbound network connections initiated by the VT-Designer process to unknown hosts
Detection Strategies
- Monitor process creation events where VT-Designer is the parent of an interpreter or scripting host
- Deploy YARA rules targeting anomalous PM3 file structures with oversized length or offset fields
- Alert on file write operations from VT-Designer to autostart locations or user profile directories outside the project workspace
Monitoring Recommendations
- Forward endpoint telemetry from OT engineering workstations into a centralized data lake for behavioral analysis
- Track file access patterns for PM3 extensions originating from non-trusted sources
- Correlate VT-Designer execution events with subsequent network connections and credential access attempts
How to Mitigate CVE-2025-7228
Immediate Actions Required
- Restrict opening of PM3 files to known, trusted project sources and verified internal repositories
- Isolate engineering workstations running VT-Designer from general-purpose internet access and email
- Apply application allowlisting to prevent unauthorized child processes spawned by VT-Designer
- Educate engineering staff about the risk of opening unsolicited PM3 project files
Patch Information
At the time of publication, no vendor patch URL is listed in the NVD entry. Consult INVT and the Zero Day Initiative Advisory ZDI-25-479 for the latest remediation status and upgrade guidance. Upgrade VT-Designer to the latest available version once a fixed release is published by INVT.
Workarounds
- Run VT-Designer under a standard user account with no administrative privileges to limit blast radius
- Block PM3 file types at the email gateway and on removable media policy enforcement
- Use file integrity monitoring on the VT-Designer installation directory and project workspaces
- Segment the OT engineering network from corporate networks to limit lateral movement after exploitation
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
