📄 Description (English)
A vulnerability was detected in Tenda F451 1.0.0.7_cn_svn7958. The affected element is the function fromAdvSetWan of the file /goform/AdvSetWan. The manipulation of the argument wanmode/PPPOEPassword results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used.
🤖 AI Executive Summary
A critical stack-based buffer overflow vulnerability exists in Tenda F451 router firmware (version 1.0.0.7_cn_svn7958) affecting the /goform/AdvSetWan endpoint. Remote attackers can exploit this via malformed wanmode or PPPOEPassword parameters to achieve code execution without authentication. With public exploit availability and no patch currently available, this poses immediate risk to organizations using affected Tenda routers for network access.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 17:38
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations across multiple sectors face significant risk: Telecom operators (STC, Mobily, Zain) using Tenda routers in network infrastructure; Banking sector (SAMA-regulated institutions) with routers in branch networks or remote access points; Government agencies (NCA oversight) relying on these devices for network perimeter; Healthcare facilities using Tenda equipment for network connectivity; Energy sector (ARAMCO, utilities) with routers in operational technology networks. The lack of authentication requirement and remote exploitability makes this particularly dangerous for critical infrastructure.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Education
Retail and E-commerce
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F451 devices in your network using network scanning tools (nmap, Shodan queries for Tenda devices)
2. Isolate affected routers from critical network segments if possible
3. Implement network-level access controls restricting access to /goform/AdvSetWan endpoint
4. Monitor for suspicious HTTP POST requests to /goform/AdvSetWan with unusual wanmode or PPPOEPassword parameters
PATCHING GUIDANCE:
1. Contact Tenda support immediately for firmware updates
2. Check manufacturer website regularly for security patches
3. If patch becomes available, schedule immediate firmware upgrade with change management approval
COMPENSATING CONTROLS (until patch available):
1. Deploy Web Application Firewall (WAF) rules blocking requests to /goform/AdvSetWan from untrusted sources
2. Restrict administrative access to router management interfaces via IP whitelisting
3. Implement network segmentation isolating router management traffic
4. Disable remote management features if not required
5. Change default credentials on all Tenda devices
DETECTION RULES:
1. Monitor for HTTP POST requests to /goform/AdvSetWan with Content-Length > 256 bytes
2. Alert on wanmode parameter values exceeding 32 characters
3. Alert on PPPOEPassword parameter values exceeding 64 characters
4. Monitor for multiple failed connection attempts to router management interface
5. IDS signature: Look for buffer overflow patterns in HTTP POST body targeting /goform/AdvSetWan
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda F451 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan)
2. عزل الأجهزة المتأثرة عن قطاعات الشبكة الحرجة إن أمكن
3. تطبيق عناصر تحكم الوصول على مستوى الشبكة لتقييد الوصول إلى نقطة النهاية /goform/AdvSetWan
4. مراقبة طلبات HTTP POST المريبة إلى /goform/AdvSetWan بمعاملات غير عادية
إرشادات التصحيح:
1. الاتصال بدعم Tenda فوراً للحصول على تحديثات البرامج الثابتة
2. التحقق من موقع الشركة المصنعة بانتظام للحصول على تصحيحات الأمان
3. إذا أصبح التصحيح متاحاً، جدولة ترقية البرامج الثابتة الفورية
عناصر التحكم البديلة (حتى توفر التصحيح):
1. نشر قواعد جدار حماية تطبيقات الويب لحظر الطلبات إلى /goform/AdvSetWan
2. تقييد الوصول الإداري إلى واجهات إدارة الموجهات
3. تطبيق تقسيم الشبكة لعزل حركة إدارة الموجهات
4. تعطيل ميزات الإدارة البعيدة إن لم تكن مطلوبة
5. تغيير بيانات الاعتماد الافتراضية على جميع الأجهزة
قواعد الكشف:
1. مراقبة طلبات HTTP POST إلى /goform/AdvSetWan بحجم محتوى > 256 بايت
2. تنبيه على قيم معاملات wanmode التي تتجاوز 32 حرفاً
3. تنبيه على قيم معاملات PPPOEPassword التي تتجاوز 64 حرفاً
4. مراقبة محاولات الاتصال الفاشلة المتعددة بواجهة إدارة الموجه
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Network security perimeter controls
ECC 2024 A.5.1.2 - Network access control
ECC 2024 A.6.2.1 - User access management
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Asset management and inventory
SAMA CSF PR.AC-1 - Access control policy and procedures
SAMA CSF PR.PT-1 - Security awareness and training
SAMA CSF DE.CM-1 - Detection and analysis
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for information security
ISO 27001:2022 A.8.1 - User endpoint devices
ISO 27001:2022 A.8.2 - Privileged access rights
ISO 27001:2022 A.12.6 - Management of technical vulnerabilities
🟣 PCI DSS v4.0.1
PCI DSS 1.1 - Firewall configuration standards
PCI DSS 2.1 - Default security parameters
PCI DSS 6.2 - Security patches and updates