CVE-2021-42627 — AI Deep Analysis Summary

🚨 **Essence**: A critical security flaw in D-Link DIR-615 routers. 📉 **Consequences**: Attackers can bypass authentication to access WAN settings, leading to data leakage and unauthorized configuration changes.

🛡️ **Root Cause**: Missing Access Control. The WAN configuration page (`wan.htm`) lacks authentication checks.…

📦 **Affected Product**: D-Link DIR-615 Wireless Router. 🏭 **Vendor**: D-Link (Taiwan). 📅 **Vulnerable Version**: Firmware version **20.06** specifically. ⚠️ Check your firmware version immediately!

💻 **Attacker Actions**: 1. Read WAN configuration data (Info Disclosure). 🕵️ 2. Modify WAN settings fields. ⚙️ 3. Potentially disrupt network connectivity or redirect traffic.…

🔓 **Threshold**: **LOW**. No password or login required. 🚪 **Access**: Direct URL access to `wan.htm` from the WAN side. Anyone on the internet can potentially exploit this if the router is exposed.

📜 **Public Exploit**: Yes. A Nuclei template exists on GitHub (ProjectDiscovery). 🧪 **PoC**: Available for automated scanning. 🌍 **Wild Exploitation**: High risk due to ease of use and lack of auth.

🔍 **Self-Check**: 1. Identify if you use D-Link DIR-615. 📶 2. Check firmware version is **20.06**. 📝 3. Use scanners like Nuclei with the CVE-2021-42627 template. 🛠️ 4.…

🩹 **Official Fix**: The data references D-Link security bulletins. 📢 **Action**: Users should check D-Link's official website for firmware updates. 🔄 **Status**: Patch available via vendor update.

🚧 **Workaround (No Patch)**: 1. Block WAN access to the router's management interface via firewall rules. 🚫 2. Disable remote management features if available. 🔒 3.…

⚡ **Priority**: **HIGH**. 🔥 **Urgency**: Critical. Since no authentication is needed, automated bots can scan and exploit this globally. 🏃‍♂️ **Advice**: Update firmware immediately or isolate the device from the WAN.