📄 Description (English)
A vulnerability was detected in Tenda HG3 2.0. The impacted element is an unknown function of the file /boaform/formCountrystr. The manipulation of the argument countrystr results in os command injection. The attack may be performed from remote. The exploit is now public and may be used.
🤖 AI Executive Summary
A critical remote command injection vulnerability exists in Tenda HG3 2.0 firmware (version 300003070) affecting the /boaform/formCountrystr endpoint. An unauthenticated attacker can execute arbitrary OS commands by manipulating the countrystr parameter. With CVSS 8.8 and public exploits available, this poses immediate risk to all deployed Tenda HG3 devices in Saudi networks, particularly in small office/home office (SOHO) and SME environments.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 30, 2026 23:29
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi SMEs, government agencies using budget networking equipment, and telecom providers (STC, Mobily, Zain) that may deploy Tenda HG3 as edge devices. Banking sector risk is moderate if used in branch office networks. Healthcare facilities using these devices for network connectivity face patient data exposure risks. Energy sector (ARAMCO, power utilities) could experience operational technology network compromise. The lack of available patches creates persistent risk across all affected sectors.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Banking and Financial Services
Government and Public Administration
Healthcare
Energy (ARAMCO, Power Utilities)
Small and Medium Enterprises (SMEs)
Education
Retail
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda HG3 devices in your network using network scanning tools (nmap, Shodan queries for Tenda devices)
2. Isolate affected devices from critical networks or place behind WAF/IPS with command injection signatures
3. Disable remote management features and restrict access to /boaform/* endpoints via firewall rules
4. Change default credentials on all Tenda HG3 devices immediately
COMPENSATING CONTROLS (until patch available):
5. Implement network segmentation - place Tenda HG3 in DMZ or isolated VLAN
6. Deploy IPS/IDS rules blocking POST requests to /boaform/formCountrystr with special characters (;|&$`)
7. Monitor for suspicious process execution from web server processes
8. Enable logging on all Tenda devices and forward to SIEM
DETECTION RULES:
- Alert on HTTP POST to /boaform/formCountrystr containing: semicolon, pipe, ampersand, backtick, dollar sign
- Monitor for unexpected child processes spawned by web server (boa/httpd)
- Log all access to /boaform/* endpoints
LONG-TERM:
9. Plan replacement of Tenda HG3 with enterprise-grade equipment (Cisco, Juniper, Fortinet)
10. Contact Tenda support for firmware updates or end-of-life timeline
11. Implement zero-trust network access controls
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع أجهزة Tenda HG3 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan)
2. عزل الأجهزة المتأثرة عن الشبكات الحرجة أو ضعها خلف جدار حماية تطبيقات ويب
3. عطّل ميزات الإدارة البعيدة وقيّد الوصول إلى نقاط نهاية /boaform/* عبر قواعد جدار الحماية
4. غيّر بيانات اعتماد افتراضية على جميع أجهزة Tenda HG3 فوراً
الضوابط البديلة (حتى توفر التصحيح):
5. طبّق تقسيم الشبكة - ضع Tenda HG3 في DMZ أو VLAN معزول
6. نشّر قواعد IPS/IDS لحجب طلبات POST إلى /boaform/formCountrystr التي تحتوي على أحرف خاصة
7. راقب تنفيذ العمليات المريبة من عمليات خادم الويب
8. فعّل التسجيل على جميع أجهزة Tenda وأرسله إلى SIEM
قواعد الكشف:
- تنبيهات على HTTP POST إلى /boaform/formCountrystr تحتوي على أحرف خاصة
- مراقبة العمليات الفرعية غير المتوقعة
- تسجيل جميع الوصول إلى نقاط نهاية /boaform/*
المدى الطويل:
9. خطط لاستبدال Tenda HG3 بمعدات على مستوى المؤسسات
10. اتصل بدعم Tenda للحصول على تحديثات البرامج الثابتة
11. طبّق ضوابط الوصول بدون ثقة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Network security perimeter controls
ECC 2024 A.5.2.1 - Access control to network services
ECC 2024 A.5.3.1 - Segregation of networks
ECC 2024 A.6.2.1 - Restriction of access to information
ECC 2024 A.8.2.3 - Removal of access rights
🔵 SAMA CSF
ID.AM-2 - Software inventory and management
PR.AC-1 - Access control policy enforcement
PR.AC-3 - Remote access management
PR.DS-1 - Data security governance
DE.CM-1 - Network monitoring and detection
🟡 ISO 27001:2022
A.5.1.1 - Information security policies
A.5.2.1 - Information security responsibilities
A.6.1.1 - Access control policy
A.6.2.1 - User access management
A.8.1.1 - Cryptography policy
A.12.6.1 - Management of technical vulnerabilities
🟣 PCI DSS v4.0.1
Requirement 1.1 - Firewall configuration standards
Requirement 2.1 - Default security parameters
Requirement 6.2 - Security patches and updates
Requirement 11.2 - Vulnerability scanning
🔗 References & Sources 5
🔗
https://vuldb.com/submit/800859
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/359719
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/359719/cti
cna@vuldb.com
Permissions Required
VDB Entry
🔗
https://www.notion.so/Tenda-HG3-1-33d0c75766a8808d8b38e9d090cec7ab
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