CVE-2025-41764 — AI Deep Analysis Summary

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-862** (Missing Authorization). ❌ **Flaw**: The `wwwupdate.cgi` endpoint lacks proper access controls. No authentication required to trigger update mechanisms.

Q: Who is affected? (Versions/Components)

📦 **Affected Products**: • MBS UBR-01 Mk II • MBS UBR-02 • MBS UBR-LON 🏭 **Vendor**: MBS Solutions (Germany). All versions likely vulnerable.

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

⚡ **Exploitation Threshold**: **LOW**. 🌐 **Network**: Remote (AV:N). 🔑 **Auth**: None required (PR:N). 🎯 **Complexity**: Low (AC:L). Easy to exploit remotely.

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

🕵️ **Public Exploit**: **None listed** in current data. ⚠️ **Risk**: Despite no public PoC, the CVSS score (High) & missing auth make it **highly susceptible** to rapid weaponization by threat actors.

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

🔍 **Self-Check**: 1. Scan for MBS UBR devices in your network. 2. Test `wwwupdate.cgi` endpoint for **unauthenticated access**. 3. Check if firmware upload is possible without credentials.

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

🩹 **Official Fix**: **Yes**. 📢 **Reference**: MBS Security Advisory [MBS-2025-0001](https://www.mbs-solutions.de/mbs-2025-0001). ✅ **Action**: Update to patched firmware immediately.

Q: What if no patch? (Workaround)

🚧 **No Patch Workaround**: 1. **Isolate**: Block network access to `wwwupdate.cgi`. 2. **Firewall**: Restrict access to trusted IPs only. 3. **Monitor**: Alert on unauthorized update attempts.

Q: Is it urgent? (Priority Suggestion)

🚨 **Urgency**: **CRITICAL**. ⏳ **Priority**: **Immediate Action Required**. 📉 **CVSS**: High (H/H). Industrial systems at risk of sabotage. Patch now!

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**: Critical flaw in MBS remote base stations & industrial interfaces. <br>🔥 **Consequences**: Attackers can upload & apply **arbitrary updates** via `wwwupdate.cgi`.…

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Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-862** (Missing Authorization). <br>❌ **Flaw**: The `wwwupdate.cgi` endpoint lacks proper access controls. No authentication required to trigger update mechanisms.

Q3Who is affected? (Versions/Components)

📦 **Affected Products**: <br>• MBS UBR-01 Mk II <br>• MBS UBR-02 <br>• MBS UBR-LON <br>🏭 **Vendor**: MBS Solutions (Germany). All versions likely vulnerable.

Q4What can hackers do? (Privileges/Data)

💻 **Attacker Capabilities**: <br>• **Full Control**: Upload malicious firmware. <br>• **Data Integrity**: Modify system behavior. <br>• **Availability**: Disrupt industrial operations.…

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Q5Is exploitation threshold high? (Auth/Config)

⚡ **Exploitation Threshold**: **LOW**. <br>🌐 **Network**: Remote (AV:N). <br>🔑 **Auth**: None required (PR:N). <br>🎯 **Complexity**: Low (AC:L). Easy to exploit remotely.

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

🕵️ **Public Exploit**: **None listed** in current data. <br>⚠️ **Risk**: Despite no public PoC, the CVSS score (High) & missing auth make it **highly susceptible** to rapid weaponization by threat actors.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: <br>1. Scan for MBS UBR devices in your network. <br>2. Test `wwwupdate.cgi` endpoint for **unauthenticated access**. <br>3. Check if firmware upload is possible without credentials.

Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: **Yes**. <br>📢 **Reference**: MBS Security Advisory [MBS-2025-0001](https://www.mbs-solutions.de/mbs-2025-0001). <br>✅ **Action**: Update to patched firmware immediately.

Q9What if no patch? (Workaround)

🚧 **No Patch Workaround**: <br>1. **Isolate**: Block network access to `wwwupdate.cgi`. <br>2. **Firewall**: Restrict access to trusted IPs only. <br>3. **Monitor**: Alert on unauthorized update attempts.

Q10Is it urgent? (Priority Suggestion)

🚨 **Urgency**: **CRITICAL**. <br>⏳ **Priority**: **Immediate Action Required**. <br>📉 **CVSS**: High (H/H). Industrial systems at risk of sabotage. Patch now!

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Vulnerability detail Full AI analysis (login) MBS CWE-862