📄 Description (English)
A vulnerability has been found in Tenda F451 1.0.0.7. Affected by this issue is the function frmL7ProtForm of the file /goform/L7Prot of the component httpd. Such manipulation of the argument page leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
🤖 AI Executive Summary
A stack-based buffer overflow vulnerability exists in Tenda F451 router firmware (version 1.0.0.7) affecting the L7 protocol filtering function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the 'page' parameter, with a CVSS score of 8.8. No patch is currently available, making this a critical concern for organizations relying on Tenda networking equipment.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 02:50
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations, particularly: (1) Banking sector and SAMA-regulated institutions using Tenda routers for network infrastructure; (2) Government agencies and NCA-supervised entities relying on these devices for network segmentation; (3) Telecommunications providers (STC, Mobily, Zain) using Tenda equipment in network deployments; (4) Healthcare facilities under MOH oversight using these routers; (5) Energy sector organizations including ARAMCO subsidiaries. The lack of available patches creates persistent exposure for all affected deployments.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Telecommunications
Healthcare
Energy and Utilities
Education
Retail and E-commerce
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.6
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Inventory all Tenda F451 devices running firmware 1.0.0.7 across your organization
2. Isolate affected routers from critical network segments if possible
3. Implement network segmentation to limit exposure of management interfaces
4. Monitor for exploitation attempts using IDS/IPS signatures
COMPENSATING CONTROLS:
1. Restrict administrative access to the httpd service via firewall rules (block port 80/443 from untrusted networks)
2. Disable L7 protocol filtering if not operationally required
3. Place affected routers behind a WAF or proxy that validates input parameters
4. Implement strict input validation at network perimeter
5. Enable detailed logging of all HTTP requests to /goform/L7Prot endpoint
DETECTION RULES:
1. Monitor for HTTP POST requests to /goform/L7ProtForm with oversized 'page' parameters
2. Alert on any requests with page parameter exceeding 256 bytes
3. Track firmware version of all Tenda devices; flag version 1.0.0.7
4. Monitor for unusual process execution following httpd requests
PATCHING STRATEGY:
1. Contact Tenda support for firmware updates or security advisories
2. Evaluate replacement with alternative vendors (Cisco, Juniper, Fortinet) for critical deployments
3. If replacement not feasible, implement compensating controls immediately
4. Plan migration timeline for affected devices
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع أجهزة Tenda F451 التي تعمل بالإصدار 1.0.0.7 في جميع أنحاء المنظمة
2. عزل الأجهزة المتأثرة عن قطاعات الشبكة الحرجة إن أمكن
3. تطبيق تقسيم الشبكة لتحديد التعرض لواجهات الإدارة
4. مراقبة محاولات الاستغلال باستخدام توقيعات IDS/IPS
الضوابط البديلة:
1. تقييد الوصول الإداري لخدمة httpd عبر قواعد جدار الحماية (حظر المنافذ 80/443 من الشبكات غير الموثوقة)
2. تعطيل تصفية بروتوكول L7 إذا لم تكن مطلوبة تشغيلياً
3. وضع الأجهزة المتأثرة خلف WAF أو وكيل يتحقق من صحة معاملات الإدخال
4. تطبيق التحقق الصارم من صحة الإدخال على محيط الشبكة
5. تفعيل تسجيل مفصل لجميع طلبات HTTP إلى نقطة النهاية /goform/L7Prot
قواعد الكشف:
1. مراقبة طلبات HTTP POST إلى /goform/L7ProtForm بمعاملات 'page' كبيرة الحجم
2. تنبيه عند أي طلبات يتجاوز معامل page فيها 256 بايت
3. تتبع إصدار البرنامج الثابت لجميع أجهزة Tenda؛ وضع علامة على الإصدار 1.0.0.7
4. مراقبة تنفيذ العمليات غير العادية بعد طلبات httpd
استراتيجية التصحيح:
1. التواصل مع دعم Tenda للحصول على تحديثات البرنامج الثابت أو التنبيهات الأمنية
2. تقييم الاستبدال بموردين بدائل (Cisco, Juniper, Fortinet) للنشرات الحرجة
3. إذا لم يكن الاستبدال ممكناً، تطبيق الضوابط البديلة فوراً
4. التخطيط لجدول زمني للهجرة من الأجهزة المتأثرة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Network security controls and device management
ECC 2024 A.5.1.2 - Access control to network devices
ECC 2024 A.6.2.1 - Vulnerability management and patching
ECC 2024 A.8.2.3 - Monitoring and detection of security incidents
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Hardware and software assets are catalogued
SAMA CSF PR.IP-12 - A vulnerability management plan is developed and implemented
SAMA CSF DE.CM-1 - The network is monitored to detect potential cybersecurity events
SAMA CSF RS.MI-2 - Incidents are mitigated
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1.1 - Policies for information security
ISO 27001:2022 A.8.1.1 - Screening of personnel
ISO 27001:2022 A.8.2.1 - User registration and de-registration
ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Ensure that all system components and software are protected from known vulnerabilities
PCI DSS 11.2 - Run automated vulnerability scanning tools regularly