CVE-2025-5624 — AI Deep Analysis Summary

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

🚨 **Essence**: Stack-based Buffer Overflow in D-Link DIR-816. 💥 **Consequences**: Remote Code Execution (RCE), full system compromise, data theft, and service disruption due to memory corruption.

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: CWE-121 (Stack-based Buffer Overflow). 🐛 **Flaw**: Improper handling of parameters like `port0_group` in the `/goform/QoSPortSetup` function. Lack of bounds checking allows stack overflow.

Q: Who is affected? (Versions/Components)

📦 **Affected Product**: D-Link DIR-816 Wireless Router. 📅 **Specific Version**: Firmware **1.10CNB05**. ⚠️ Other versions may be safe, but this specific build is vulnerable.

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

🔓 **Privileges**: Attacker gains **High** impact. 📊 **Data**: Can read/write critical system data. 🌐 **Availability**: Service can be crashed. Essentially, **Full Control** over the router is possible.

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

🔑 **Auth**: None Required (PR:N). 🌍 **Access**: Network Accessible (AV:N). 🎯 **Complexity**: Low (AC:L). 🤝 **User Interaction**: None (UI:N). **Threshold**: Extremely Low. Any remote attacker can exploit it.

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

📂 **Public Exp**: Yes. 🔗 **Reference**: GitHub repo `wudipjq/my_vuln` contains exploit code. 🚀 **Status**: Wild exploitation is likely possible given the low barrier to entry.

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

🩹 **Patch**: Vendor (D-Link) likely issued a fix. 📝 **Action**: Check D-Link support page for firmware updates > 1.10CNB05. 🔄 **Mitigation**: Update to the latest stable firmware version immediately.

Q: Is it urgent? (Priority Suggestion)

🔥 **Priority**: **CRITICAL**. 🚨 **Urgency**: Immediate action required. CVSS Score is High (9.8+ implied by H/I/H). ⏳ **Risk**: Zero-day exploitation is highly probable. Patch NOW.

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**: Stack-based Buffer Overflow in D-Link DIR-816. 💥 **Consequences**: Remote Code Execution (RCE), full system compromise, data theft, and service disruption due to memory corruption.

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: CWE-121 (Stack-based Buffer Overflow). 🐛 **Flaw**: Improper handling of parameters like `port0_group` in the `/goform/QoSPortSetup` function. Lack of bounds checking allows stack overflow.

Q3Who is affected? (Versions/Components)

📦 **Affected Product**: D-Link DIR-816 Wireless Router. 📅 **Specific Version**: Firmware **1.10CNB05**. ⚠️ Other versions may be safe, but this specific build is vulnerable.

Q4What can hackers do? (Privileges/Data)

🔓 **Privileges**: Attacker gains **High** impact. 📊 **Data**: Can read/write critical system data. 🌐 **Availability**: Service can be crashed. Essentially, **Full Control** over the router is possible.

Q5Is exploitation threshold high? (Auth/Config)

🔑 **Auth**: None Required (PR:N). 🌍 **Access**: Network Accessible (AV:N). 🎯 **Complexity**: Low (AC:L). 🤝 **User Interaction**: None (UI:N). **Threshold**: Extremely Low. Any remote attacker can exploit it.

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

📂 **Public Exp**: Yes. 🔗 **Reference**: GitHub repo `wudipjq/my_vuln` contains exploit code. 🚀 **Status**: Wild exploitation is likely possible given the low barrier to entry.

Q7How to self-check? (Features/Scanning)

🔍 **Check**: Scan for D-Link DIR-816 devices running firmware **1.10CNB05**. 📡 **Feature**: Look for exposure of `/goform/QoSPortSetup` endpoint.…

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Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Patch**: Vendor (D-Link) likely issued a fix. 📝 **Action**: Check D-Link support page for firmware updates > 1.10CNB05. 🔄 **Mitigation**: Update to the latest stable firmware version immediately.

Q9What if no patch? (Workaround)

🚧 **Workaround**: Block external access to the router's management interface. 🛑 **Filter**: Disable QoS features if possible. 📵 **Network**: Isolate the router from untrusted networks.…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Priority**: **CRITICAL**. 🚨 **Urgency**: Immediate action required. CVSS Score is High (9.8+ implied by H/I/H). ⏳ **Risk**: Zero-day exploitation is highly probable. Patch NOW.

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Vulnerability detail Full AI analysis (login) D-Link CWE-121