📄 Description (English)
A vulnerability was identified in Tenda CX12L 16.03.53.12. This affects the function fromAddressNat of the file /goform/addressNat. The manipulation of the argument page leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit is publicly available and might be used.
🤖 AI Executive Summary
A critical stack-based buffer overflow vulnerability exists in Tenda CX12L routers (firmware 16.03.53.12) affecting the /goform/addressNat endpoint. Remote attackers can exploit this via the 'page' parameter to achieve code execution without authentication. With no patch available and public exploit details emerging, this poses immediate risk to organizations using Tenda networking equipment across Saudi Arabia.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 20:17
🇸🇦 Saudi Arabia Impact Assessment
High impact on Saudi telecommunications sector (STC, Mobily, Zain) and enterprise networks using Tenda CX12L as edge routers. Banking and financial institutions (SAMA-regulated) face critical risk if these devices are deployed in network perimeters. Government agencies and critical infrastructure operators (energy sector, ARAMCO networks) are at significant risk. Healthcare facilities using Tenda equipment for network connectivity could experience service disruption. Small and medium enterprises across all sectors represent a large attack surface given Tenda's market penetration in Saudi Arabia.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Banking and Financial Services
Government and Public Administration
Energy and Utilities (ARAMCO, SEC)
Healthcare
Small and Medium Enterprises
Education
Retail and E-commerce
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda CX12L devices running firmware 16.03.53.12 in your network inventory
2. Isolate affected devices from internet-facing positions immediately
3. Implement network segmentation to restrict access to /goform/addressNat endpoint
4. Enable firewall rules to block HTTP POST requests to /goform/addressNat from untrusted sources
5. Monitor for exploitation attempts using IDS/IPS signatures
COMPENSATING CONTROLS (until patch available):
6. Deploy WAF rules to filter malicious 'page' parameter values (detect buffer overflow patterns)
7. Implement strict input validation at network boundary
8. Restrict administrative access to router management interfaces to authorized IPs only
9. Disable remote management features if not required
10. Consider replacing affected devices with patched alternatives from other vendors
DETECTION RULES:
- Monitor for POST requests to /goform/addressNat with oversized 'page' parameter values
- Alert on any successful code execution attempts from router processes
- Track firmware version in asset inventory and flag 16.03.53.12 instances
- Monitor router process behavior for unexpected child process spawning
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda CX12L التي تعمل بالإصدار 16.03.53.12 في جرد الشبكة
2. عزل الأجهزة المتأثرة عن المواضع المواجهة للإنترنت فوراً
3. تنفيذ تقسيم الشبكة لتقييد الوصول إلى نقطة النهاية /goform/addressNat
4. تفعيل قواعد جدار الحماية لحظر طلبات HTTP POST إلى /goform/addressNat من مصادر غير موثوقة
5. مراقبة محاولات الاستغلال باستخدام توقيعات IDS/IPS
الضوابط البديلة (حتى توفر التصحيح):
6. نشر قواعد WAF لتصفية قيم معامل 'page' الضارة (كشف أنماط تجاوز المخزن المؤقت)
7. تنفيذ التحقق الصارم من صحة الإدخال على حدود الشبكة
8. تقييد الوصول الإداري إلى واجهات إدارة الموجه إلى عناوين IP مصرح بها فقط
9. تعطيل ميزات الإدارة البعيدة إذا لم تكن مطلوبة
10. النظر في استبدال الأجهزة المتأثرة بدائل معدلة من بائعين آخرين
قواعد الكشف:
- مراقبة طلبات POST إلى /goform/addressNat بقيم معامل 'page' كبيرة الحجم
- تنبيه عند أي محاولات تنفيذ أوامر ناجحة من عمليات الموجه
- تتبع إصدار البرنامج الثابت في جرد الأصول والإشارة إلى حالات 16.03.53.12
- مراقبة سلوك عملية الموجه للكشف عن توليد عمليات فرعية غير متوقعة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.8.1 - Asset Management and Inventory Control
ECC 2024 A.8.2 - Network Security and Segmentation
ECC 2024 A.9.1 - Access Control and Authentication
ECC 2024 A.12.6 - Vulnerability Management and Patch Management
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Physical and Cyber Assets Inventory
SAMA CSF PR.AC-1 - Access Control and Authentication
SAMA CSF PR.PT-1 - Security Architecture and Design
SAMA CSF DE.CM-1 - Detection and Monitoring
🟡 ISO 27001:2022
ISO 27001:2022 A.5.19 - Secure Development Policy
ISO 27001:2022 A.8.1 - Asset Management
ISO 27001:2022 A.8.2 - Information Security Roles and Responsibilities
ISO 27001:2022 A.12.6 - Management of Technical Vulnerabilities
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security Patches and Updates
PCI DSS 11.2 - Vulnerability Scanning
PCI DSS 1.1 - Firewall Configuration Standards