OTPulse

Fuji Electric Monitouch V-SFT

Plan PatchCVSS 7.3ICS-CERT ICSA-17-222-04Aug 10, 2017
Fuji ElectricEnergy
Attack path
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

Fuji Electric Monitouch V-SFT contains multiple buffer overflow and memory corruption vulnerabilities (CWE-121, CWE-122) and improper privilege management (CWE-269) in versions prior to 5.4.43.0. These flaws allow remote attackers without credentials to read sensitive information, modify settings, or cause denial of service by exploiting weak input validation in the HMI communication protocol. The vulnerability affects energy sector operators relying on V-SFT for SCADA visualization and process management.

What this means
What could happen
An attacker could read sensitive data, modify process configurations, or cause the human-machine interface (HMI) to become unavailable, disrupting operator visibility and control of energy generation or distribution equipment.
Who's at risk
Energy sector operators managing Fuji Electric Monitouch V-SFT human-machine interfaces (HMI) used to monitor and control generation, transmission, or distribution systems should prioritize patching. This includes anyone using V-SFT versions prior to 5.4.43.0 for SCADA data visualization or process control interfaces.
How it could be exploited
An attacker with network access to the Monitouch V-SFT system can send crafted packets over the network to trigger buffer overflow or memory corruption vulnerabilities without authentication. This allows arbitrary code execution or unauthorized access to data stored on the HMI server.
Prerequisites
  • Network connectivity to Monitouch V-SFT (typically port 21866 or similar HMI communication port)
  • No authentication required
  • Ability to craft and send network packets
remotely exploitableno authentication requiredlow complexityhigh CVSS score (7.3)affects control system visibility and operations
Exploitability
Some exploitation risk — EPSS score 4.9%
Affected products (1)
ProductAffected VersionsFix Status
Monitouch V-SFT:< 5.4.43.05.4.43.0
Remediation & Mitigation
0/3
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXUpdate Monitouch V-SFT to version 5.4.43.0 or later
Long-term hardening
0/2
HARDENINGIsolate Monitouch V-SFT systems on a dedicated engineering network segment with firewall rules restricting access to authorized operator workstations and engineering systems only
HARDENINGImplement network monitoring to detect unauthorized connection attempts to Monitouch V-SFT ports
View full CISA ICS-CERT advisory
API: /api/v1/advisories/4778363a-1f03-407c-b10a-1d0ce7fdec14

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