CVE-2025-3755 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Mitsubishi Electric MELSEC iQ-F series has a critical flaw. ⚠️ **Consequences**: Input validation failure leads to **Denial of Service (DoS)** or **CPU module stop**. System halts! 💥

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-1285** (Improper Neutralization of Special Elements). ❌ **Flaw**: **Insufficient input validation**. The system fails to sanitize incoming data properly. 📉

Q: Who is affected? (Versions/Components)

🏭 **Affected Vendor**: Mitsubishi Electric Corporation. 🔧 **Product**: **MELSEC iQ-F Series** (specifically FX5U-32MT/ES mentioned). 📅 **Published**: May 29, 2025. 📝

Q: Is exploitation threshold high? (Auth/Config)

🔑 **Threshold**: **Low**. 🌐 **Network**: Attack Vector is Network (AV:N). 🔓 **Auth**: No Privileges Required (PR:N). 👤 **User**: No User Interaction (UI:N). Easy to exploit remotely! 🚀

Q: Is there a public Exp? (PoC/Wild Exploitation)

📦 **Public Exploit**: **None listed** in current data. 🔍 **Pocs**: Empty array. ⚠️ **Status**: No known PoC or wild exploitation yet. But risk is high due to low barrier. 🛑

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for **Mitsubishi MELSEC iQ-F** devices. 📡 **Focus**: Look for **FX5U-32MT/ES** models. 📋 **Verify**: Check firmware versions against vendor advisories. Use ICS scanners. 🕵️♂️

Q: What if no patch? (Workaround)

🚧 **No Patch Workaround**: 🔒 **Isolate**: Segment the network. 🛡️ **Firewall**: Restrict access to PLC ports. 👀 **Monitor**: Watch for abnormal CPU stops or DoS patterns. 📉

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. 📈 **CVSS**: High severity (C:H, A:H). ⚡ **Ease**: Low complexity, no auth needed. 🚨 **Priority**: Patch immediately! Critical infrastructure risk. ⏳

Updated May 06, 2026 CVSS 9.1 · Critical

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Mitsubishi Electric MELSEC iQ-F series has a critical flaw. <br>⚠️ **Consequences**: Input validation failure leads to **Denial of Service (DoS)** or **CPU module stop**. System halts! 💥

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-1285** (Improper Neutralization of Special Elements). <br>❌ **Flaw**: **Insufficient input validation**. The system fails to sanitize incoming data properly. 📉

Q3Who is affected? (Versions/Components)

🏭 **Affected Vendor**: Mitsubishi Electric Corporation. <br>🔧 **Product**: **MELSEC iQ-F Series** (specifically FX5U-32MT/ES mentioned). <br>📅 **Published**: May 29, 2025. 📝

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Action**: Can trigger **DoS** or **CPU Stop**. <br>🔒 **Impact**: High Confidentiality (C:H) & High Availability (A:H). <br>🚫 **Result**: Operational disruption.…

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Q5Is exploitation threshold high? (Auth/Config)

🔑 **Threshold**: **Low**. <br>🌐 **Network**: Attack Vector is Network (AV:N). <br>🔓 **Auth**: No Privileges Required (PR:N). <br>👤 **User**: No User Interaction (UI:N). Easy to exploit remotely! 🚀

Q6Is there a public Exp? (PoC/Wild Exploitation)

📦 **Public Exploit**: **None listed** in current data. <br>🔍 **Pocs**: Empty array. <br>⚠️ **Status**: No known PoC or wild exploitation yet. But risk is high due to low barrier. 🛑

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for **Mitsubishi MELSEC iQ-F** devices. <br>📡 **Focus**: Look for **FX5U-32MT/ES** models. <br>📋 **Verify**: Check firmware versions against vendor advisories. Use ICS scanners. 🕵️‍♂️

Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: **Yes**. <br>📄 **Source**: Vendor Advisory (Mitsubishi Electric PSIRT). <br>🔗 **Ref**: [2025-003_en.pdf](https://www.mitsubishielectric.com/psirt/vulnerability/pdf/2025-003_en.pdf).…

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Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>🔒 **Isolate**: Segment the network. <br>🛡️ **Firewall**: Restrict access to PLC ports. <br>👀 **Monitor**: Watch for abnormal CPU stops or DoS patterns. 📉

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. <br>📈 **CVSS**: High severity (C:H, A:H). <br>⚡ **Ease**: Low complexity, no auth needed. <br>🚨 **Priority**: Patch immediately! Critical infrastructure risk. ⏳

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Vulnerability detail Full AI analysis (login) Mitsubishi Electric Corporation CWE-1285