📄 Description (English)
A vulnerability was found in Tenda F456 1.0.0.5. Impacted is the function fromqossetting of the file /goform/qossetting. The manipulation of the argument page results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used.
🤖 AI Executive Summary
A critical stack-based buffer overflow vulnerability exists in Tenda F456 router firmware (version 1.0.0.5) affecting the QoS settings function. The vulnerability allows remote attackers to execute arbitrary code without authentication by manipulating the 'page' parameter. With CVSS 8.8 and public exploit details available, this poses an immediate threat to organizations using this router model for network management.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 11:32
🇸🇦 Saudi Arabia Impact Assessment
Saudi telecommunications operators (STC, Mobily, Zain) and government agencies using Tenda F456 routers for network infrastructure are at critical risk. Banking sector organizations relying on these routers for branch connectivity face potential compromise of financial data. Healthcare institutions using this equipment for network segmentation could experience service disruption. Energy sector (ARAMCO) and critical infrastructure operators may face network infiltration. Small and medium enterprises across all sectors using this router model are vulnerable to remote code execution and complete network compromise.
🏢 Affected Saudi Sectors
Telecommunications
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Small and Medium Enterprises
Education
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify and inventory all Tenda F456 devices in your network using network scanning tools
2. Isolate affected routers from critical network segments if possible
3. Implement network segmentation to limit router access to trusted administrative networks only
4. Disable remote management features on the router immediately
5. Change all default credentials and implement strong authentication
PATCHING GUIDANCE:
1. Contact Tenda support for firmware updates (no patch currently available - monitor vendor advisories)
2. If no patch becomes available within 30 days, plan replacement with alternative router models
3. Implement temporary WAF/IPS rules to block requests to /goform/qossetting endpoint
COMPENSATING CONTROLS:
1. Deploy IPS/IDS signatures to detect buffer overflow attempts on port 80/443
2. Implement strict input validation at network perimeter
3. Monitor router logs for suspicious QoS configuration requests
4. Restrict administrative access to router management interface via firewall rules
5. Implement network-based detection for abnormal traffic patterns from router
DETECTION RULES:
1. Alert on HTTP requests containing 'page' parameter with excessive length (>256 bytes) to /goform/qossetting
2. Monitor for unexpected process execution originating from router IP addresses
3. Track failed authentication attempts followed by successful code execution patterns
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد وحصر جميع أجهزة Tenda F456 في شبكتك باستخدام أدوات المسح
2. عزل أجهزة التوجيه المتأثرة عن القطاعات الحرجة في الشبكة إن أمكن
3. تطبيق تقسيم الشبكة لتحديد وصول جهاز التوجيه للشبكات الإدارية الموثوقة فقط
4. تعطيل ميزات الإدارة البعيدة على جهاز التوجيه فورًا
5. تغيير جميع بيانات الاعتماد الافتراضية وتطبيق المصادقة القوية
إرشادات التصحيح:
1. التواصل مع دعم Tenda للحصول على تحديثات البرامج الثابتة (لا يوجد تصحيح حاليًا)
2. إذا لم يتوفر تصحيح خلال 30 يومًا، خطط لاستبدال جهاز التوجيه بنماذج بديلة
3. تطبيق قواعس WAF/IPS مؤقتة لحجب الطلبات إلى نقطة النهاية /goform/qossetting
الضوابط البديلة:
1. نشر توقيعات IPS/IDS للكشف عن محاولات تجاوز المخزن المؤقت
2. تطبيق التحقق الصارم من صحة المدخلات على محيط الشبكة
3. مراقبة سجلات جهاز التوجيه للطلبات المريبة لإعدادات جودة الخدمة
4. تقييد الوصول الإداري لواجهة إدارة جهاز التوجيه عبر قواعد جدار الحماية
5. تطبيق الكشف القائم على الشبكة للأنماط غير الطبيعية
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures
A.8.1.1 - User access management
A.12.2.1 - Change management procedures
A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
ID.AM-2 - Hardware and software assets are inventoried
PR.AC-1 - Identities and credentials are issued and managed
PR.PT-2 - Removable media is protected and its use restricted
DE.CM-1 - The network is monitored for unauthorized connections
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development policy
A.12.2.1 - Change management
A.13.1.1 - Network security perimeter
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches must be installed
Requirement 11.2 - Vulnerability scanning
Requirement 1.1 - Firewall configuration standards
🔗 References & Sources 5