📄 Description (English)
A vulnerability was detected in Tenda F456 1.0.0.5. This affects the function fromexeCommand of the file /goform/exeCommand. Performing a manipulation of the argument cmdinput results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may 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 /goform/exeCommand endpoint. The vulnerability allows remote attackers to execute arbitrary code by manipulating the cmdinput parameter, with a CVSS score of 8.8. No patch is currently available, making immediate mitigation essential for Saudi organizations relying on this router model.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 14:36
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi telecommunications infrastructure (STC, Mobily, Zain), government agencies, and enterprises using Tenda F456 routers as edge devices. Banking sector (SAMA-regulated institutions) faces elevated risk if these routers are deployed in branch networks or as remote access points. Healthcare organizations and critical infrastructure operators using this model for network segmentation are particularly vulnerable. The public exploit availability and lack of patch significantly increase exploitation likelihood across Saudi networks.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Banking and Financial Services (SAMA-regulated)
Government and Public Administration
Healthcare
Energy and Utilities
Critical Infrastructure
Enterprise Networks
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F456 1.0.0.5 devices in your network using network scanning tools (nmap, Shodan queries for Saudi IP ranges)
2. Isolate affected routers from critical network segments immediately
3. Disable remote management features and restrict access to /goform/exeCommand endpoint via firewall rules
4. Change default credentials on all Tenda devices (if not already done)
COMPENSATING CONTROLS:
5. Implement Web Application Firewall (WAF) rules to block requests to /goform/exeCommand with suspicious cmdinput parameters
6. Deploy network segmentation to limit lateral movement from compromised routers
7. Monitor for exploitation attempts using IDS/IPS signatures detecting buffer overflow patterns
8. Enable logging on all Tenda devices and forward logs to SIEM for analysis
DETECTION RULES:
- Alert on POST requests to /goform/exeCommand with cmdinput parameter exceeding 256 bytes
- Monitor for unusual process execution originating from router IP addresses
- Track failed authentication attempts followed by command execution attempts
PATCHING:
9. Contact Tenda support for firmware updates; consider replacing devices if no patch timeline provided
10. Evaluate alternative router models from vendors with active security support
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda F456 1.0.0.5 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan للنطاقات السعودية)
2. عزل الأجهزة المتأثرة عن قطاعات الشبكة الحرجة فوراً
3. تعطيل ميزات الإدارة البعيدة وتقييد الوصول إلى نقطة النهاية /goform/exeCommand عبر قواعد جدار الحماية
4. تغيير بيانات الاعتماد الافتراضية على جميع أجهزة Tenda
الضوابط التعويضية:
5. تطبيق قواعد جدار تطبيقات الويب (WAF) لحجب الطلبات إلى /goform/exeCommand مع معاملات cmdinput المريبة
6. نشر تقسيم الشبكة لتحديد الحركة الجانبية من أجهزة التوجيه المخترقة
7. مراقبة محاولات الاستغلال باستخدام توقيعات IDS/IPS التي تكتشف أنماط فيض المخزن المؤقت
8. تفعيل التسجيل على جميع أجهزة Tenda وإعادة توجيه السجلات إلى SIEM للتحليل
قواعد الكشف:
- تنبيه على طلبات POST إلى /goform/exeCommand مع معامل cmdinput يتجاوز 256 بايت
- مراقبة تنفيذ العمليات غير العادية من عناوين IP جهاز التوجيه
- تتبع محاولات المصادقة الفاشلة متبوعة بمحاولات تنفيذ الأوامر
التصحيح:
9. الاتصال بدعم Tenda للحصول على تحديثات البرامج الثابتة؛ فكر في استبدال الأجهزة إذا لم يتم توفير جدول زمني للتصحيح
10. تقييم نماذج أجهزة التوجيه البديلة من البائعين الذين يتمتعون بدعم أمان نشط
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.8.1 - Asset management and inventory control
A.8.2 - Information security for network devices
A.13.1 - Network security perimeter controls
A.14.2 - System development and change management
🔵 SAMA CSF
ID.AM-2 - Software platforms and applications are inventoried
PR.DS-1 - Data-at-rest is protected
PR.PT-1 - Audit/log records are determined, documented, implemented, and reviewed
DE.CM-1 - The network is monitored to detect potential cybersecurity events
🟡 ISO 27001:2022
A.8.1.1 - Inventory of assets
A.8.1.3 - Asset return
A.12.2.1 - Restrictions on software installation
A.12.6.1 - Management of technical vulnerabilities
🟣 PCI DSS v4.0.1
Requirement 1.1 - Firewall configuration standards
Requirement 6.2 - Security patches and updates
Requirement 11.2 - Vulnerability scanning
🔗 References & Sources 5