📄 Description (English)
A vulnerability was detected in Tenda F456 1.0.0.5. This impacts the function fromSafeMacFilter of the file /goform/SafeMacFilter. The manipulation of the argument page results in buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used.
🤖 AI Executive Summary
A critical buffer overflow vulnerability exists in Tenda F456 router firmware (version 1.0.0.5) affecting the SafeMacFilter function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the 'page' parameter, potentially compromising network security for organizations and individuals using this widely deployed device. With public exploit information available and no patch currently released, immediate mitigation is essential for Saudi organizations relying on this equipment.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 27, 2026 12:49
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi telecommunications infrastructure (STC, Mobily, Zain), government agencies using Tenda equipment for network management, banking sector network perimeters, and healthcare facilities. Small and medium enterprises (SMEs) across Saudi Arabia are particularly vulnerable as Tenda routers are commonly deployed in cost-conscious network environments. The vulnerability enables complete network compromise, data exfiltration, and lateral movement into critical systems. Government entities under NCA oversight and financial institutions regulated by SAMA face elevated risk due to potential regulatory compliance violations.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Government and Public Administration
Banking and Financial Services
Healthcare
Energy and Utilities
Small and Medium Enterprises (SMEs)
Education
Retail
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F456 devices in your network using network scanning tools (nmap, Shodan queries for Saudi IP ranges)
2. Isolate affected devices from critical network segments if possible
3. Implement network segmentation to restrict access to router management interfaces
4. Change default credentials immediately (admin/admin) and enforce strong passwords
5. Disable remote management features (disable WAN access to admin interface)
6. Monitor router logs for suspicious access attempts to /goform/SafeMacFilter endpoint
COMPENSATING CONTROLS (until patch available):
7. Deploy WAF/IPS rules blocking requests to /goform/SafeMacFilter with suspicious 'page' parameters
8. Implement network-based detection: monitor for POST requests with buffer overflow payloads (long strings, encoded shellcode patterns)
9. Restrict administrative access via firewall rules to trusted IP ranges only
10. Enable router logging and forward logs to SIEM for analysis
DETECTION RULES:
- Alert on HTTP POST requests to /goform/SafeMacFilter with 'page' parameter exceeding 256 bytes
- Monitor for unusual process execution on router (SSH/Telnet access patterns)
- Track failed authentication attempts to router management interface
- Flag any firmware modification attempts
LONG-TERM:
11. Replace Tenda F456 devices with patched alternatives or alternative vendors
12. Establish vendor security update monitoring process
13. Implement firmware integrity verification mechanisms
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda F456 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan للنطاقات السعودية)
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة في الشبكة إن أمكن
3. تطبيق تقسيم الشبكة لتقييد الوصول إلى واجهات إدارة جهاز التوجيه
4. تغيير بيانات الاعتماد الافتراضية فوراً وفرض كلمات مرور قوية
5. تعطيل ميزات الإدارة البعيدة (تعطيل الوصول عبر WAN إلى واجهة الإدارة)
6. مراقبة سجلات جهاز التوجيه للكشف عن محاولات وصول مريبة إلى نقطة النهاية /goform/SafeMacFilter
الضوابط البديلة (حتى توفر التصحيح):
7. نشر قواعد WAF/IPS لحجب الطلبات إلى /goform/SafeMacFilter بمعاملات 'page' مريبة
8. تطبيق الكشف القائم على الشبكة: مراقبة طلبات POST بحمولات تجاوز المخزن المؤقت
9. تقييد الوصول الإداري عبر قواعد جدار الحماية إلى نطاقات IP موثوقة فقط
10. تفعيل تسجيل جهاز التوجيه وإعادة توجيه السجلات إلى SIEM
قواعد الكشف:
- تنبيه على طلبات HTTP POST إلى /goform/SafeMacFilter مع معامل 'page' يتجاوز 256 بايت
- مراقبة تنفيذ العمليات غير العادية على جهاز التوجيه
- تتبع محاولات المصادقة الفاشلة على واجهة إدارة جهاز التوجيه
- وضع علامة على أي محاولات تعديل البرنامج الثابت
المدى الطويل:
11. استبدال أجهزة Tenda F456 بأجهزة معدلة أو بدائل من بائعين آخرين
12. إنشاء عملية مراقبة تحديثات أمان البائع
13. تطبيق آليات التحقق من سلامة البرنامج الثابت
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.8.1 - Asset Management and Inventory Control
ECC 2024 A.12.6 - Management of Technical Vulnerabilities
ECC 2024 A.14.2 - System Development and Maintenance
ECC 2024 A.13.1 - Network Security
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset Management
SAMA CSF PR.IP-12 - Vulnerability Management
SAMA CSF DE.CM-8 - Malicious Code Detection
SAMA CSF RS.MI-2 - Incident Response and Recovery
🟡 ISO 27001:2022
ISO 27001:2022 A.5.19 - Vulnerability Management
ISO 27001:2022 A.8.1 - Asset Management
ISO 27001:2022 A.12.6 - Management of Technical Vulnerabilities
ISO 27001:2022 A.14.2 - System Development and Maintenance
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security Patches and Updates
PCI DSS 11.2 - Vulnerability Scanning
PCI DSS 2.1 - Default Credentials
🔗 References & Sources 5
🔗
https://github.com/Litengzheng/vuldb_new/blob/main/F456/vul_121/README.md
cna@vuldb.com
Exploit
Third Party Advisory
🔗
https://vuldb.com/submit/798452
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/359611
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/359611/cti
cna@vuldb.com
Permissions Required
VDB Entry
🔗
https://www.tenda.com.cn/
cna@vuldb.com
Product
📦 Affected Products / CPE 1 entries
tenda:f456_firmware:1.0.0.5