Mitsubishi Electric Europe B.V. E-Designer
Act Now9.8ICS-CERT ICSA-17-213-01Aug 1, 2017
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
Mitsubishi Electric E-Designer contains multiple buffer overflow vulnerabilities (CWE-121, CWE-122, CWE-787) in input validation that allow remote code execution without authentication. The affected version is E-Designer 7.52 build 344 and earlier. Mitsubishi has discontinued E-Designer and will not release security patches. Organizations must migrate to the replacement product, GT Works, or implement strict network isolation.
What this means
What could happen
An attacker with network access to E-Designer could execute arbitrary code on the HMI system, potentially altering operator interface logic, stealing process data, or disrupting human-machine interface functions that control critical energy operations.
Who's at risk
Energy sector operators using Mitsubishi E-Designer HMI software should prioritize this. This affects organizations running outdated Mitsubishi HMI interfaces for SCADA visualization and control on industrial networks, particularly those supporting generation, transmission, or distribution systems.
How it could be exploited
An attacker on the network sends a malformed input to E-Designer that exploits a buffer overflow vulnerability (CWE-121/122/787). This input is not validated by the application and causes memory corruption, allowing arbitrary code execution on the HMI with the privileges of the E-Designer process.
Prerequisites
- Network access to E-Designer HMI system
- E-Designer version 7.52 build 344 or earlier running
- No authentication required to send exploit payload
remotely exploitableno authentication requiredlow complexityno patch availablediscontinued product
Exploitability
Low exploit probability (EPSS 0.6%)
Affected products (1)
ProductAffected VersionsFix Status
E-Designer:7.52 build 344No fix (EOL)
Remediation & Mitigation
0/4
Do now
0/1WORKAROUNDImmediately isolate E-Designer HMI systems from the production network or restrict network access via firewall rules (allow only authorized engineering workstations and block external access)
Schedule — requires maintenance window
0/1Patching may require device reboot — plan for process interruption
HOTFIXMigrate from E-Designer to Mitsubishi's GT Works product suite as the vendor has discontinued E-Designer and will not release patches
Mitigations - no patch available
0/2E-Designer: has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGImplement network segmentation to isolate HMI systems in a dedicated VLAN separate from corporate IT and other operational networks
HARDENINGMonitor network traffic to E-Designer systems for suspicious connections and malformed packets
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