CVE-2025-40765 — AI Deep Analysis Summary

Q: Who is affected? (Versions/Components)

🏭 **Affected Vendor**: Siemens. 📦 **Product**: TeleControl Server Basic V3.1. 📅 **Versions**: V3.1.2.2 **up to** (but not including) V3.1.2.3. Older versions are also at risk.

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

⚡ **Threshold**: **LOW**. 🌐 **Network**: Remote (AV:N). 🔒 **Auth**: None required (PR:N). 👤 **User Interaction**: None (UI:N). Easy to exploit from anywhere.

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

🚫 **Public Exploit**: **No**. 📄 **PoCs**: Empty list in data. ⚠️ **Status**: Theoretical risk. No known wild exploitation yet, but the low barrier makes it attractive.

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

🔍 **Self-Check**: Scan for Siemens TeleControl Server Basic. 🔎 **Version Check**: Verify if running V3.1.2.2 or earlier. 🛠️ **Tool**: Use vulnerability scanners targeting CWE-306 on industrial control systems.

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

✅ **Fix**: Yes. 📦 **Patch**: Upgrade to **V3.1.2.3** or later. 🔗 **Source**: Siemens Security Advisory SSA-062309. Official patch available.

Q: What if no patch? (Workaround)

🚧 **No Patch Workaround**: Isolate the server. 🚫 **Network**: Block external access to the service port. 👀 **Monitor**: Watch for unusual authentication attempts. Restrict access to trusted IPs only.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. ⚠️ **Priority**: Immediate action required. 📉 **Risk**: CVSS 9.1 (Critical). Remote code/data theft potential. Patch immediately to prevent industrial espionage or sabotage.

Updated May 06, 2026 CVSS 9.8 · Critical

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Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Access Control Error in Siemens TeleControl Server Basic. <br>💥 **Consequences**: Attackers can steal user password hashes. This leads to full database service authentication compromise.…

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Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-306** (Missing Authentication for Critical Function). <br>❌ **Flaw**: The system fails to verify identity before exposing sensitive data (password hashes).…

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Q3Who is affected? (Versions/Components)

🏭 **Affected Vendor**: Siemens. <br>📦 **Product**: TeleControl Server Basic V3.1. <br>📅 **Versions**: V3.1.2.2 **up to** (but not including) V3.1.2.3. Older versions are also at risk.

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Action**: Remote, unauthenticated access. <br>🔑 **Data Stolen**: User password hashes.…

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Q5Is exploitation threshold high? (Auth/Config)

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

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

🚫 **Public Exploit**: **No**. <br>📄 **PoCs**: Empty list in data. <br>⚠️ **Status**: Theoretical risk. No known wild exploitation yet, but the low barrier makes it attractive.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for Siemens TeleControl Server Basic. <br>🔎 **Version Check**: Verify if running V3.1.2.2 or earlier. <br>🛠️ **Tool**: Use vulnerability scanners targeting CWE-306 on industrial control systems.

Q8Is it fixed officially? (Patch/Mitigation)

✅ **Fix**: Yes. <br>📦 **Patch**: Upgrade to **V3.1.2.3** or later. <br>🔗 **Source**: Siemens Security Advisory SSA-062309. Official patch available.

Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: Isolate the server. <br>🚫 **Network**: Block external access to the service port. <br>👀 **Monitor**: Watch for unusual authentication attempts. Restrict access to trusted IPs only.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. <br>⚠️ **Priority**: Immediate action required. <br>📉 **Risk**: CVSS 9.1 (Critical). Remote code/data theft potential. Patch immediately to prevent industrial espionage or sabotage.

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