CVE-2025-40771 — AI Deep Analysis Summary

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

🚨 **Essence**: Access Control Error in Siemens SIMATIC CP Series. ⚠️ **Consequences**: Unauthenticated remote attackers can access configuration data. Critical integrity and confidentiality loss.

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-306** (Missing Authentication for Critical Function). ❌ **Flaw**: Configuration connections are **not correctly verified**. Identity checks are bypassed.

Q: Who is affected? (Versions/Components)

🏭 **Affected**: **Siemens SIMATIC CP Series**. 📦 **Specific Product**: **SIMATIC CP 1542SP-1**. 📅 **Published**: 2025-10-14.

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

💻 **Attacker Action**: Remote, unauthenticated access. 🔓 **Privileges**: Full access to **configuration data**. 📉 **Impact**: High (CVSS 3.1). Data theft, manipulation, or system disruption.

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

📉 **Threshold**: **LOW**. 🔑 **Auth**: **None required** (PR:N). 🌐 **Network**: Remote (AV:N). 👤 **User Interaction**: None (UI:N). Easy to exploit.

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

🕵️ **Public Exploit**: **No**. 📂 **PoCs**: Empty list in data. 🌍 **Wild Exploitation**: Not indicated. Likely zero-day or internal discovery.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. 📈 **Priority**: **P0**. ⚡ **Reason**: Remote, unauthenticated, high impact. 🏃 **Action**: Patch immediately upon availability. Monitor Siemens alerts.

Updated May 06, 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**: Access Control Error in Siemens SIMATIC CP Series. <br>⚠️ **Consequences**: Unauthenticated remote attackers can access configuration data. Critical integrity and confidentiality loss.

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-306** (Missing Authentication for Critical Function). <br>❌ **Flaw**: Configuration connections are **not correctly verified**. Identity checks are bypassed.

Q3Who is affected? (Versions/Components)

🏭 **Affected**: **Siemens SIMATIC CP Series**. <br>📦 **Specific Product**: **SIMATIC CP 1542SP-1**. <br>📅 **Published**: 2025-10-14.

Q4What can hackers do? (Privileges/Data)

💻 **Attacker Action**: Remote, unauthenticated access. <br>🔓 **Privileges**: Full access to **configuration data**. <br>📉 **Impact**: High (CVSS 3.1). Data theft, manipulation, or system disruption.

Q5Is exploitation threshold high? (Auth/Config)

📉 **Threshold**: **LOW**. <br>🔑 **Auth**: **None required** (PR:N). <br>🌐 **Network**: Remote (AV:N). <br>👤 **User Interaction**: None (UI:N). Easy to exploit.

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

🕵️ **Public Exploit**: **No**. <br>📂 **PoCs**: Empty list in data. <br>🌍 **Wild Exploitation**: Not indicated. Likely zero-day or internal discovery.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for **Siemens SIMATIC CP 1542SP-1**. <br>🔎 **Feature**: Check for unauthenticated access to configuration endpoints.…

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Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: **Yes**. <br>📄 **Reference**: Siemens SSA-486936. <br>🔗 **Link**: [cert-portal.siemens.com](https://cert-portal.siemens.com/productcert/html/ssa-486936.html).…

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Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>🚫 **Network Segmentation**: Block external access to CP series. <br>🔒 **Firewall**: Restrict access to management interfaces.…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. <br>📈 **Priority**: **P0**. <br>⚡ **Reason**: Remote, unauthenticated, high impact. <br>🏃 **Action**: Patch immediately upon availability. Monitor Siemens alerts.

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Vulnerability detail Full AI analysis (login) Siemens CWE-306