CVE-2025-47756

7.8 HIGH

📋 TL;DR

This vulnerability in V-SFT v6.2.5.0 and earlier allows attackers to trigger an out-of-bounds read when opening specially crafted V7 or V8 files. Successful exploitation could lead to application crashes, information disclosure, or arbitrary code execution. Users of V-SFT software versions up to 6.2.5.0 are affected.

💻 Affected Systems

Products:
  • V-SFT
Versions: v6.2.5.0 and earlier
Operating Systems: Windows
Default Config Vulnerable: ⚠️ Yes
Notes: Vulnerability triggers when opening specially crafted V7 or V8 files. The software is primarily used for industrial control system programming and configuration.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution with SYSTEM/root privileges leading to complete system compromise, data theft, and lateral movement within the network.

🟠

Likely Case

Application crash and potential information disclosure through memory leaks, possibly leading to privilege escalation if combined with other vulnerabilities.

🟢

If Mitigated

Application crash without code execution if memory protections (ASLR, DEP) are effective, but still causing denial of service.

🌐 Internet-Facing: MEDIUM
🏢 Internal Only: HIGH

🎯 Exploit Status

Public PoC: ✅ No
Weaponized: UNKNOWN
Unauthenticated Exploit: ⚠️ Yes
Complexity: MEDIUM

Exploitation requires user interaction to open a malicious file. No public exploit code is currently available, but the vulnerability details are publicly disclosed.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: v6.2.6.0 or later

Vendor Advisory: https://monitouch.fujielectric.com/site/download-e/09vsft6_inf/Search.php

Restart Required: Yes

Instructions:

1. Download the latest version from Fuji Electric's official website. 2. Uninstall the current vulnerable version. 3. Install the patched version. 4. Restart the system to ensure all components are properly loaded.

🔧 Temporary Workarounds

File Type Restriction

all

Block or restrict opening of V7 and V8 files from untrusted sources

Application Hardening

windows

Run V-SFT with reduced privileges and enable DEP/ASLR

bcdedit.exe /set {current} nx AlwaysOn
bcdedit.exe /set {current} increaseuserva 3072

🧯 If You Can't Patch

  • Implement strict file validation policies to only allow trusted V7/V8 files
  • Deploy application whitelisting to prevent execution of unauthorized files

🔍 How to Verify

Check if Vulnerable:

Check Help > About in V-SFT application. If version is 6.2.5.0 or earlier, the system is vulnerable.

Check Version:

Not applicable - check via application GUI

Verify Fix Applied:

Verify version is 6.2.6.0 or later in Help > About. Test opening known safe V7/V8 files to ensure functionality.

📡 Detection & Monitoring

Log Indicators:

  • Application crash logs from V-SFT
  • Windows Event Logs showing application failures (Event ID 1000)

Network Indicators:

  • Unusual file transfers of V7/V8 files from external sources
  • SMB/NFS transfers containing V-SFT project files

SIEM Query:

source="windows" AND (event_id=1000 AND process_name="VS6EditData.exe") OR (file_name="*.v7" OR file_name="*.v8") AND action="open"

🔗 References

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