📄 Description (English)
A vulnerability was determined in Tenda HG3 2.0. Impacted is the function formUploadConfig of the file /boaform/formIPv6Routing. This manipulation of the argument destNet causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.
🤖 AI Executive Summary
A critical stack-based buffer overflow vulnerability exists in Tenda HG3 2.0 router firmware affecting the IPv6 routing configuration function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the destNet parameter, with public exploits already available. This poses an immediate threat to Saudi organizations using these devices for network infrastructure.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 1, 2026 04:32
🇸🇦 Saudi Arabia Impact Assessment
High impact on Saudi telecommunications sector (STC, Mobily, Zain) and government agencies using Tenda HG3 devices as edge routers. Banking sector (SAMA-regulated institutions) at risk if these devices are deployed in branch networks or remote office connectivity. Healthcare organizations and critical infrastructure operators using these routers for network segmentation face potential compromise. Energy sector (ARAMCO, utilities) could experience network disruption if devices are compromised. Small to medium enterprises across all sectors represent significant exposure given Tenda's market penetration in Saudi Arabia.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Small and Medium Enterprises
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda HG3 2.0 devices in your network using network scanning tools (nmap, Shodan queries for Saudi IP ranges)
2. Isolate affected devices from critical network segments immediately
3. Disable remote management interfaces (SSH, HTTP/HTTPS admin access) if possible
4. Implement network segmentation to restrict access to these devices
PATCHING GUIDANCE:
1. Check Tenda's official support portal for firmware updates beyond version 300003070
2. If no patch is available, plan device replacement with alternative vendors (Cisco, Juniper, Huawei)
3. Contact Tenda support directly for security advisories
COMPENSATING CONTROLS (until patching):
1. Deploy WAF/IPS rules to block malformed IPv6 routing configuration requests
2. Implement strict ACLs limiting access to /boaform/formIPv6Routing endpoint
3. Monitor for suspicious destNet parameter values in logs
4. Enable detailed logging on affected devices
DETECTION RULES:
1. Monitor for HTTP POST requests to /boaform/formIPv6Routing with oversized destNet parameters (>128 bytes)
2. Alert on any stack trace errors or device crashes following IPv6 configuration attempts
3. Track firmware version changes and unauthorized configuration modifications
4. Monitor for command execution attempts following router access
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda HG3 2.0 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan للنطاقات السعودية)
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة في الشبكة فوراً
3. تعطيل واجهات الإدارة البعيدة (SSH، وصول HTTP/HTTPS للمسؤول) إن أمكن
4. تطبيق تقسيم الشبكة لتقييد الوصول إلى هذه الأجهزة
إرشادات التصحيح:
1. التحقق من بوابة دعم Tenda الرسمية للحصول على تحديثات البرامج الثابتة بعد الإصدار 300003070
2. إذا لم يكن هناك تصحيح متاح، خطط لاستبدال الجهاز بموردين بدائل (Cisco، Juniper، Huawei)
3. التواصل مع دعم Tenda مباشرة للحصول على التنبيهات الأمنية
الضوابط البديلة (حتى التصحيح):
1. نشر قواعد WAF/IPS لحجب طلبات تكوين توجيه IPv6 المشوهة
2. تطبيق قوائم التحكم في الوصول الصارمة لتقييد الوصول إلى نقطة نهاية /boaform/formIPv6Routing
3. مراقبة قيم معامل destNet المريبة في السجلات
4. تفعيل التسجيل التفصيلي على الأجهزة المتأثرة
قواعد الكشف:
1. مراقبة طلبات HTTP POST إلى /boaform/formIPv6Routing مع معاملات destNet كبيرة الحجم (>128 بايت)
2. التنبيه على أي أخطاء تتبع المكدس أو أعطال الجهاز بعد محاولات تكوين IPv6
3. تتبع تغييرات إصدار البرامج الثابتة والتعديلات غير المصرح بها على الإعدادات
4. مراقبة محاولات تنفيذ الأوامر بعد الوصول إلى جهاز التوجيه
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
ECC 2024 A.14.2.1 - Secure development policy
ECC 2024 A.12.2.1 - Monitoring and logging of network access
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset Management and Vulnerability Management
SAMA CSF PR.IP-12 - Security patch management
SAMA CSF DE.CM-1 - Detection and monitoring of anomalies
🟡 ISO 27001:2022
ISO 27001:2022 A.12.2.1 - Monitoring and logging
ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities
ISO 27001:2022 A.14.2.1 - Secure development and change management
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patches must be installed within defined timeframe
PCI DSS 11.2 - Vulnerability scanning and remediation
🔗 References & Sources 5
🔗
https://vuldb.com/submit/802058
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/359750
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/359750/cti
cna@vuldb.com
Permissions Required
VDB Entry
🔗
https://www.notion.so/33e0c75766a88041bd86d3810994a541
cna@vuldb.com
Exploit
Third Party Advisory
🔗
https://www.tenda.com.cn/
cna@vuldb.com
Product
📦 Affected Products / CPE 1 entries
tenda:hg3_firmware:300003070