CVE-2024-6422 — AI Deep Analysis Summary

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

🚨 **Essence**: Critical Access Control Error in Pepperl+Fuchs OIT Series. 💥 **Consequences**: Remote attackers can fully compromise the device. Total loss of Confidentiality, Integrity, and Availability (CVSS 9.8).

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-306** (Missing Authentication for Critical Function). ❌ **Flaw**: The Telnet service lacks proper access controls, allowing unauthenticated interaction.

Q: Who is affected? (Versions/Components)

🏭 **Affected Vendor**: Pepperl+Fuchs. 📦 **Products**: OIT1500, OIT200, OIT500, OIT700 series. 📉 **Versions**: V2.11.0 and earlier.

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

🕵️ **Attacker Actions**: 1️⃣ Manipulate device settings. 2️⃣ Stop critical processes. 3️⃣ Read, delete, or modify data. 🔓 **Privileges**: Full control without login.

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

📉 **Threshold**: **LOW**. 🌐 **Access**: Network (AV:N). 🔑 **Auth**: None required (PR:N). 👀 **UI**: None required (UI:N). ⚡ **Complexity**: Low (AC:L).

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

📜 **Public Exploit**: **No**. 🚫 **PoC**: Not available in the provided data. ⚠️ **Risk**: Despite no public PoC, the low barrier makes it highly attractive for automated attacks.

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

🔍 **Self-Check**: 1. Scan for open **Telnet ports** (23) on OIT devices. 2. Verify firmware version against **V2.11.0**. 3. Attempt unauthenticated Telnet connection.

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

🩹 **Official Fix**: **Yes**. 📢 **Source**: VDE CERT Advisory VDE-2024-038. ✅ **Action**: Update firmware to patched versions immediately.

Q: What if no patch? (Workaround)

🚧 **No Patch Workaround**: 1. **Block Port 23** at the firewall. 2. Disable Telnet service if possible. 3. Isolate devices in a secure VLAN.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. 🚨 **Priority**: Immediate action required. 📈 **CVSS**: 9.8 (Critical). ⏳ **Time**: Patch now to prevent remote takeover.

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**: Critical Access Control Error in Pepperl+Fuchs OIT Series. <br>💥 **Consequences**: Remote attackers can fully compromise the device. Total loss of Confidentiality, Integrity, and Availability (CVSS 9.8).

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-306** (Missing Authentication for Critical Function). <br>❌ **Flaw**: The Telnet service lacks proper access controls, allowing unauthenticated interaction.

Q3Who is affected? (Versions/Components)

🏭 **Affected Vendor**: Pepperl+Fuchs. <br>📦 **Products**: OIT1500, OIT200, OIT500, OIT700 series. <br>📉 **Versions**: V2.11.0 and earlier.

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Actions**: <br>1️⃣ Manipulate device settings. <br>2️⃣ Stop critical processes. <br>3️⃣ Read, delete, or modify data. <br>🔓 **Privileges**: Full control without login.

Q5Is exploitation threshold high? (Auth/Config)

📉 **Threshold**: **LOW**. <br>🌐 **Access**: Network (AV:N). <br>🔑 **Auth**: None required (PR:N). <br>👀 **UI**: None required (UI:N). <br>⚡ **Complexity**: Low (AC:L).

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

📜 **Public Exploit**: **No**. <br>🚫 **PoC**: Not available in the provided data. <br>⚠️ **Risk**: Despite no public PoC, the low barrier makes it highly attractive for automated attacks.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1. Scan for open **Telnet ports** (23) on OIT devices. <br>2. Verify firmware version against **V2.11.0**. <br>3. Attempt unauthenticated Telnet connection.

Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: **Yes**. <br>📢 **Source**: VDE CERT Advisory VDE-2024-038. <br>✅ **Action**: Update firmware to patched versions immediately.

Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>1. **Block Port 23** at the firewall. <br>2. Disable Telnet service if possible. <br>3. Isolate devices in a secure VLAN.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. <br>🚨 **Priority**: Immediate action required. <br>📈 **CVSS**: 9.8 (Critical). <br>⏳ **Time**: Patch now to prevent remote takeover.

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Vulnerability detail Full AI analysis (login) Pepperl+Fuchs CWE-306