📄 Description (English)
Thecus N4800Eco NAS Server Control Panel contains a command injection vulnerability that allows authenticated attackers to execute arbitrary system commands through user management endpoints. Attackers can inject commands via username and batch user creation parameters to execute shell commands with administrative privileges.
🤖 AI Executive Summary
CVE-2021-47816 is a critical command injection vulnerability in Thecus N4800Eco NAS servers affecting the Control Panel's user management functionality. Authenticated attackers can inject arbitrary shell commands through username and batch user creation parameters, achieving remote code execution with administrative privileges. While no public exploit is available, the vulnerability poses significant risk to organizations using these NAS devices for data storage and backup operations.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 01:59
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations in banking, government, healthcare, and energy sectors utilizing Thecus N4800Eco NAS devices for critical data storage and backup face significant risk. Financial institutions under SAMA oversight, government agencies under NCA jurisdiction, healthcare facilities managing patient records, and ARAMCO-affiliated energy operations are particularly vulnerable. The vulnerability enables lateral movement within networks and potential data exfiltration from centralized storage systems. Organizations in the telecommunications sector (STC, Mobily) using these devices for infrastructure backup are also at risk.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare and Medical Facilities
Energy and Utilities
Telecommunications
Data Centers and Cloud Services
Enterprise IT Infrastructure
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Thecus N4800Eco NAS devices in your environment using network scanning tools
2. Restrict access to the Control Panel to trusted administrative networks only via firewall rules
3. Disable remote management access if not operationally required
4. Monitor user management logs for suspicious account creation activities
PATCHING:
5. Apply the latest firmware patch from Thecus immediately
6. Test patches in non-production environments before deployment
7. Maintain offline backups before patching critical systems
COMPENSATING CONTROLS:
8. Implement strong authentication (disable default credentials, enforce complex passwords)
9. Deploy network segmentation to isolate NAS devices from critical systems
10. Enable audit logging for all administrative actions on the NAS
11. Implement IP whitelisting for Control Panel access
DETECTION:
12. Monitor for suspicious command patterns in NAS logs (shell metacharacters in user creation requests)
13. Alert on failed authentication attempts followed by successful access
14. Track unusual process execution on NAS devices
15. Monitor for unexpected outbound connections from NAS devices
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Thecus N4800Eco NAS في بيئتك باستخدام أدوات المسح
2. تقييد الوصول إلى لوحة التحكم للشبكات الإدارية الموثوقة فقط عبر قواعد جدار الحماية
3. تعطيل الإدارة البعيدة إذا لم تكن مطلوبة تشغيلياً
4. مراقبة سجلات إدارة المستخدمين للأنشطة المريبة
التصحيح:
5. تطبيق أحدث تصحيح البرامج الثابتة من Thecus فوراً
6. اختبار التصحيحات في بيئات غير الإنتاج قبل النشر
7. الحفاظ على نسخ احتياطية غير متصلة قبل تصحيح الأنظمة الحرجة
الضوابط البديلة:
8. تنفيذ المصادقة القوية (تعطيل بيانات الاعتماد الافتراضية، فرض كلمات مرور معقدة)
9. نشر تقسيم الشبكة لعزل أجهزة NAS عن الأنظمة الحرجة
10. تفعيل تسجيل التدقيق لجميع الإجراءات الإدارية على NAS
11. تنفيذ القائمة البيضاء للعناوين IP لوصول لوحة التحكم
الكشف:
12. مراقبة أنماط الأوامر المريبة في سجلات NAS (أحرف shell في طلبات إنشاء المستخدمين)
13. التنبيه على محاولات المصادقة الفاشلة متبوعة بالوصول الناجح
14. تتبع تنفيذ العمليات غير المتوقعة على أجهزة NAS
15. مراقبة الاتصالات الخارجية غير المتوقعة من أجهزة NAS
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policies
ECC 2024 A.8.2.1 - User Registration and De-registration
ECC 2024 A.8.2.3 - Management of Privileged Access Rights
ECC 2024 A.12.4.1 - Event Logging
ECC 2024 A.12.4.3 - Protection of Log Information
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Hardware Inventory
SAMA CSF PR.AC-1 - Access Control Policy
SAMA CSF PR.AC-4 - Access Rights Management
SAMA CSF DE.CM-1 - System Monitoring
SAMA CSF DE.AE-1 - Audit Logging
🟡 ISO 27001:2022
ISO 27001:2022 A.5.3 - Segregation of Duties
ISO 27001:2022 A.8.2.1 - User Registration and De-registration
ISO 27001:2022 A.8.2.3 - Management of Privileged Access Rights
ISO 27001:2022 A.8.3.1 - Password Management
ISO 27001:2022 A.12.4.1 - Event Logging
🟣 PCI DSS v4.0
PCI DSS 2.1 - Change Default Passwords
PCI DSS 6.2 - Security Patches
PCI DSS 7.1 - Limit Access to System Components
PCI DSS 8.1 - User ID Assignment
PCI DSS 10.2 - Implement Automated Audit Trails
🔗 References & Sources 5
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http://www.thecus.com/
disclosure@vulncheck.com
http://www.thecus.com/product.php?PROD_ID=83
disclosure@vulncheck.com
https://docs.unsafe-inline.com/0day/thecus-n4800eco-nas-server-control-panel-comand-inj...
disclosure@vulncheck.com
https://www.exploit-db.com/exploits/49926
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/thecus-neco-nas-server-control-panel-command-injec...
disclosure@vulncheck.com