CVE-2025-61856
📋 TL;DR
A stack-based buffer overflow vulnerability in V-SFT v6.2.7.0 and earlier allows attackers to execute arbitrary code by tricking users into opening malicious V-SFT files. This affects organizations using Fuji Electric's V-SFT software for industrial control system configuration and monitoring. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Fuji Electric V-SFT
📦 What is this software?
Monitouch V Sft by Fujielectric
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the engineering workstation, potentially enabling lateral movement to industrial control systems and operational disruption.
Likely Case
Local privilege escalation leading to unauthorized access to engineering configurations, process manipulation, or denial of service affecting industrial operations.
If Mitigated
Limited impact through proper network segmentation and user privilege restrictions, potentially resulting only in application crashes.
🎯 Exploit Status
Exploitation requires user interaction to open malicious files. No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v6.2.8.0 or later
Vendor Advisory: https://monitouch.fujielectric.com/site/download-e/09vsft6_inf/Search.php
Restart Required: Yes
Instructions:
1. Download V-SFT v6.2.8.0 or later from Fuji Electric's download site. 2. Close all V-SFT applications. 3. Run the installer with administrative privileges. 4. Restart the system after installation completes.
🔧 Temporary Workarounds
Restrict V-SFT file execution
windowsPrevent execution of V-SFT files from untrusted sources by implementing application whitelisting
Using AppLocker: New-AppLockerPolicy -RuleType Path -Action Deny -Path "*.vsf" -User Everyone
User privilege reduction
windowsRun V-SFT with limited user privileges to reduce impact of successful exploitation
🧯 If You Can't Patch
- Implement strict network segmentation to isolate V-SFT workstations from critical control systems
- Train users to never open V-SFT files from untrusted sources and implement file hash verification procedures
🔍 How to Verify
Check if Vulnerable:
Check V-SFT version in Help > About menu. Versions 6.2.7.0 or earlier are vulnerable.Check Version:
Check registry: HKEY_LOCAL_MACHINE\SOFTWARE\Fuji Electric\V-SFT\VersionVerify Fix Applied:
Verify version shows 6.2.8.0 or later in Help > About menu after patching.📡 Detection & Monitoring
Log Indicators:
- Application crashes of V-SFT.exe with exception codes like 0xC0000005 (ACCESS_VIOLATION)
- Unusual file access patterns to V-SFT project files
Network Indicators:
- Unusual outbound connections from V-SFT workstations
- File transfers of V-SFT project files to unexpected destinations
SIEM Query:
EventID=1000 AND SourceName="Application Error" AND ProcessName="V-SFT.exe"