CVE-2025-47753: Fujielectric Monitouch V-SFT RCE Flaw

CVE-2025-47753 Overview

CVE-2025-47753 is an out-of-bounds read vulnerability in Fuji Electric's Monitouch V-SFT v6 software, used to configure programmable display terminals in industrial control environments. The flaw exists in the VS6EditData!CDrawSLine::GetRectArea function and affects versions 6.2.5.0 and earlier. An attacker who convinces a user to open a specially crafted V7 or V8 project file can trigger a crash, disclose process memory, or achieve arbitrary code execution in the context of the application. The weakness is tracked under CWE-125 (Out-of-Bounds Read).

Critical Impact
Opening a malicious V7 or V8 file in V-SFT v6 can lead to arbitrary code execution on engineering workstations used to configure HMI devices.

Affected Products

Fuji Electric Monitouch V-SFT v6, versions 6.2.5.0 and earlier
V-SFT v6 installations that process V7 project files
V-SFT v6 installations that process V8 project files

Discovery Timeline

2025-05-19 - CVE-2025-47753 published to NVD
2025-05-19 - Last updated in NVD database

Technical Details for CVE-2025-47753

Vulnerability Analysis

The vulnerability resides in the CDrawSLine::GetRectArea routine inside the VS6EditData module of V-SFT v6. The function calculates a rectangular drawing area for a line object based on values parsed from V7 or V8 project files. When the file supplies malformed geometry or count fields, the function reads memory beyond the bounds of the allocated buffer.

This out-of-bounds read [CWE-125] returns adjacent process memory to the calling code. Depending on how the leaked data is used downstream, the issue produces three outcomes: a crash, disclosure of sensitive memory contents, or arbitrary code execution. The CVSS 4.0 attack vector is local and requires user interaction, which aligns with engineers manually opening project files.

Root Cause

The root cause is missing or insufficient bounds validation on attacker-controlled fields parsed from V7 and V8 file formats. CDrawSLine::GetRectArea trusts size or index values from the file when computing memory offsets. Without sanity checks against the actual buffer length, crafted inputs steer the read pointer outside the allocated region.

Attack Vector

Exploitation requires an authorized user to open a malicious V7 or V8 file in V-SFT v6. Attackers typically deliver such files through phishing emails, shared engineering drives, removable media, or compromised supply chain repositories. Because V-SFT runs on engineering workstations connected to operational technology networks, successful exploitation gives attackers a foothold for lateral movement into control system environments.

No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The vulnerability mechanism is documented in the JVN Vulnerability Report.

Detection Methods for CVE-2025-47753

Indicators of Compromise

Unexpected crashes of V-SFT.exe or related V-SFT v6 processes when opening project files
V7 or V8 project files received from untrusted sources or arriving on engineering workstations outside normal change workflows
Child processes spawned by V-SFT v6 that do not match the legitimate application launch chain
Anomalous memory access violations logged by Windows Error Reporting for VS6EditData modules

Detection Strategies

Monitor process behavior on engineering workstations for V-SFT executables spawning shells, scripting hosts, or network connections
Inspect file shares and email gateways for V7 and V8 file attachments originating outside the engineering organization
Correlate Windows application crash events referencing VS6EditData or CDrawSLine with subsequent suspicious activity

Monitoring Recommendations

Enable application crash and exception logging on all hosts running V-SFT v6 and forward events to a central SIEM
Track file write and execution events for .V7 and .V8 files on engineering workstations
Alert on V-SFT processes performing actions outside their normal scope, such as registry modification or persistence creation

How to Mitigate CVE-2025-47753

Immediate Actions Required

Inventory all systems running V-SFT v6 and identify installations at version 6.2.5.0 or earlier
Restrict opening of V7 and V8 files to those received through trusted, verified channels
Isolate engineering workstations running V-SFT from general-purpose corporate networks and the internet
Apply the fixed version from the Fuji Electric Monitouch download portal as soon as it is available

Patch Information

Fuji Electric distributes updated V-SFT v6 installers through the Monitouch download portal. Administrators should download the latest available release that supersedes version 6.2.5.0 and verify the version number through the application's About dialog after installation. Refer to the JVN advisory JVNVU97228144 for vendor coordination details.

Workarounds

Do not open V7 or V8 project files received from untrusted sources or unverified senders
Run V-SFT v6 under a standard user account rather than an administrator account to limit the impact of code execution
Use application allowlisting to prevent V-SFT from launching child processes such as cmd.exe or powershell.exe
Store legitimate project files on access-controlled repositories with integrity verification

bash

# Verify installed V-SFT v6 version on Windows engineering workstations
wmic product where "Name like 'V-SFT%%'" get Name,Version

# Block execution of V7/V8 files from user download directories via AppLocker path rule
New-AppLockerPolicy -RuleType Path -User Everyone -Action Deny `
  -Path "%USERPROFILE%\Downloads\*.V7","%USERPROFILE%\Downloads\*.V8"