CVE-2023-49621 — AI Deep Analysis Summary

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

🚨 **Essence**: Siemens SIMATIC CN 4100 has a critical flaw. 📉 **Consequences**: Full system compromise. CVSS Score is **9.8 (Critical)**. Data theft, modification, and total service disruption are possible. ⚠️

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-1392** (Hardcoded Credentials). 💡 **Flaw**: The 'intermediate installation' state uses **default admin credentials**. Attackers know the password by default. 🔑

Q: Who is affected? (Versions/Components)

🏭 **Affected**: **Siemens SIMATIC CN 4100**. 🌍 **Vendor**: Siemens (Germany). 📦 **Component**: Communication Node. ⚠️ Any unit with default settings is at risk.

Q: What can hackers do? (Privileges/Data)

💀 **Privileges**: **Administrator Access**. 📂 **Data**: Full Read/Write/Delete. 🔄 **Impact**: High Confidentiality, Integrity, and Availability loss. Hackers own the device. 👑

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

📉 **Threshold**: **LOW**. 🚫 **Auth**: None required (PR:N). 🌐 **Network**: Remote (AV:N). 🖱️ **UI**: None needed. Easy to exploit from anywhere. 🚀

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

🕵️ **Public Exp?**: **No PoC listed** in data. 📜 **Reference**: Siemens SSA-777015 PDF available. 📢 **Status**: Theoretical risk is high due to default creds, but no specific code is public yet. 🤫

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

🔍 **Check**: Scan for **SIMATIC CN 4100** devices. 🛠️ **Feature**: Check for **default admin accounts**. 📋 **Action**: Verify if 'intermediate installation' state is active with default creds. 🧐

Q: Is it fixed officially? (Patch/Mitigation)

🩹 **Fixed?**: Yes. 📄 **Patch**: Refer to **Siemens SSA-777015**. 🔗 **Link**: cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf. 🔄 **Action**: Update immediately per official guide. ✅

Q: What if no patch? (Workaround)

🚧 **No Patch?**: **Change Default Passwords** immediately. 🔄 **Isolate**: Network segment the device. 🚫 **Disable**: If not needed, disable the intermediate installation state. 🛑

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. ⏰ **Priority**: **P1 (Immediate)**. 🚨 CVSS 9.8 + Default Creds = High Risk. 🏃♂️ Patch now or change creds today. 🆘

Updated May 08, 2026 CVSS 9.8 · 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**: Siemens SIMATIC CN 4100 has a critical flaw. 📉 **Consequences**: Full system compromise. CVSS Score is **9.8 (Critical)**. Data theft, modification, and total service disruption are possible. ⚠️

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-1392** (Hardcoded Credentials). 💡 **Flaw**: The 'intermediate installation' state uses **default admin credentials**. Attackers know the password by default. 🔑

Q3Who is affected? (Versions/Components)

🏭 **Affected**: **Siemens SIMATIC CN 4100**. 🌍 **Vendor**: Siemens (Germany). 📦 **Component**: Communication Node. ⚠️ Any unit with default settings is at risk.

Q4What can hackers do? (Privileges/Data)

💀 **Privileges**: **Administrator Access**. 📂 **Data**: Full Read/Write/Delete. 🔄 **Impact**: High Confidentiality, Integrity, and Availability loss. Hackers own the device. 👑

Q5Is exploitation threshold high? (Auth/Config)

📉 **Threshold**: **LOW**. 🚫 **Auth**: None required (PR:N). 🌐 **Network**: Remote (AV:N). 🖱️ **UI**: None needed. Easy to exploit from anywhere. 🚀

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

🕵️ **Public Exp?**: **No PoC listed** in data. 📜 **Reference**: Siemens SSA-777015 PDF available. 📢 **Status**: Theoretical risk is high due to default creds, but no specific code is public yet. 🤫

Q7How to self-check? (Features/Scanning)

🔍 **Check**: Scan for **SIMATIC CN 4100** devices. 🛠️ **Feature**: Check for **default admin accounts**. 📋 **Action**: Verify if 'intermediate installation' state is active with default creds. 🧐

Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Fixed?**: Yes. 📄 **Patch**: Refer to **Siemens SSA-777015**. 🔗 **Link**: cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf. 🔄 **Action**: Update immediately per official guide. ✅

Q9What if no patch? (Workaround)

🚧 **No Patch?**: **Change Default Passwords** immediately. 🔄 **Isolate**: Network segment the device. 🚫 **Disable**: If not needed, disable the intermediate installation state. 🛑

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. ⏰ **Priority**: **P1 (Immediate)**. 🚨 CVSS 9.8 + Default Creds = High Risk. 🏃‍♂️ Patch now or change creds today. 🆘

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Vulnerability detail Full AI analysis (login) Siemens CWE-1392