📄 Description (English)
D-Link Multiple Routers Command Injection Vulnerability — Multiple D-Link routers contain a command injection vulnerability which can allow attackers to achieve full system compromise.
🤖 AI Executive Summary
CVE-2019-16920 is a critical command injection vulnerability affecting multiple D-Link router models, allowing unauthenticated or authenticated attackers to execute arbitrary OS commands and achieve full system compromise. With a CVSS score of 9.0 and a publicly available exploit, this vulnerability poses an immediate and severe threat to any network infrastructure relying on affected D-Link devices. The vulnerability can be leveraged to pivot into internal networks, intercept traffic, or establish persistent backdoors. Given the widespread deployment of D-Link routers in SME and residential environments across Saudi Arabia, the risk of exploitation is elevated.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 14, 2026 19:39
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations across multiple sectors face significant risk from this vulnerability. SMEs and government agencies that deployed D-Link routers as edge or branch office devices are most exposed. Telecom resellers (STC, Mobily, Zain) who provisioned D-Link routers to subscribers may face large-scale compromise of customer premises equipment. Healthcare facilities and smaller government entities that lack enterprise-grade networking infrastructure are particularly vulnerable. Energy sector remote sites and SCADA-adjacent networks using D-Link devices for connectivity could face operational disruption. Banking sector (SAMA-regulated entities) with branch offices using consumer-grade D-Link routers risk network perimeter breaches enabling lateral movement toward core banking systems.
🏢 Affected Saudi Sectors
Government
Telecom
Healthcare
Education
SME/Retail
Energy
Banking
⚖️ Saudi Risk Score (AI)
8.7
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all D-Link router models in your environment and cross-reference with the affected product list for CVE-2019-16920.
2. Isolate affected devices from critical network segments immediately if patching cannot be performed right away.
3. Disable remote management (WAN-side administration) on all affected D-Link routers immediately.
PATCHING GUIDANCE:
4. Apply the latest firmware updates provided by D-Link for affected models. Visit https://support.dlink.com for official firmware.
5. For end-of-life (EOL) models where no patch is available, replace the device with a supported alternative immediately.
6. After patching, perform a factory reset and reconfigure the device to eliminate any potential backdoors.
COMPENSATING CONTROLS:
7. Implement strict ACLs to block access to router management interfaces from untrusted networks.
8. Deploy network segmentation to limit the blast radius if a router is compromised.
9. Enable IDS/IPS signatures for command injection patterns targeting D-Link devices.
10. Monitor outbound traffic from router management IPs for anomalous connections.
DETECTION RULES:
11. Create SIEM alerts for HTTP POST requests containing shell metacharacters (;, |, &&, ``) targeting D-Link management URLs.
12. Monitor for unexpected outbound connections from router IP addresses to external hosts.
13. Check for new administrative accounts or configuration changes on routers.
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع طرازات أجهزة توجيه D-Link في بيئتك وقارنها بقائمة المنتجات المتأثرة بـ CVE-2019-16920.
2. عزل الأجهزة المتأثرة عن قطاعات الشبكة الحيوية فوراً إذا تعذّر تطبيق التصحيح على الفور.
3. تعطيل الإدارة عن بُعد (إدارة جانب WAN) على جميع أجهزة توجيه D-Link المتأثرة فوراً.
إرشادات التصحيح:
4. تطبيق آخر تحديثات البرامج الثابتة التي يوفرها D-Link للطرازات المتأثرة. تفضل بزيارة https://support.dlink.com للحصول على البرامج الثابتة الرسمية.
5. بالنسبة للطرازات التي انتهت دورة حياتها (EOL) والتي لا يتوفر لها تصحيح، استبدل الجهاز ببديل مدعوم فوراً.
6. بعد التصحيح، أجرِ إعادة ضبط المصنع وأعد تهيئة الجهاز للقضاء على أي أبواب خلفية محتملة.
ضوابط التعويض:
7. تطبيق قوائم التحكم في الوصول (ACL) الصارمة لحظر الوصول إلى واجهات إدارة الموجّه من الشبكات غير الموثوقة.
8. نشر تجزئة الشبكة للحد من نطاق الضرر في حال اختراق الموجّه.
9. تفعيل توقيعات IDS/IPS لأنماط حقن الأوامر التي تستهدف أجهزة D-Link.
10. مراقبة حركة المرور الصادرة من عناوين IP لإدارة الموجّه بحثاً عن اتصالات غير طبيعية.
قواعد الكشف:
11. إنشاء تنبيهات SIEM لطلبات HTTP POST التي تحتوي على محارف خاصة بالصدفة (;، |، &&، ``) تستهدف عناوين URL لإدارة D-Link.
12. مراقبة الاتصالات الصادرة غير المتوقعة من عناوين IP للموجّه إلى مضيفين خارجيين.
13. التحقق من وجود حسابات إدارية جديدة أو تغييرات في التهيئة على الموجّهات.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-1-4-2: Asset Management — Inventory of network devices
ECC-2-3-1: Vulnerability Management — Patch and update management
ECC-2-5-1: Network Security — Secure network architecture and segmentation
ECC-2-5-3: Network Security — Remote access controls
ECC-2-6-1: Cybersecurity Event Management — Monitoring and detection
🔵 SAMA CSF
3.3.3 Vulnerability Management — Timely patching of network infrastructure
3.3.5 Network Security — Perimeter device hardening
3.3.6 Identity and Access Management — Restricting administrative access
3.3.9 Cyber Security Monitoring — Detection of exploitation attempts
🟡 ISO 27001:2022
A.8.8 Management of technical vulnerabilities
A.8.20 Networks security
A.8.22 Segregation of networks
A.8.9 Configuration management
A.8.16 Monitoring activities
🟣 PCI DSS v4.0
Requirement 1.2: Network security controls configuration
Requirement 6.3.3: All system components protected from known vulnerabilities by patching
Requirement 12.3.2: Targeted risk analysis for technology in use
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
D-Link:Multiple Routers