📄 Description (English)
D-Link DSL-2750B Devices Command Injection Vulnerability — D-Link DSL-2750B devices contain a command injection vulnerability that allows remote, unauthenticated command injection via the login.cgi cli parameter.
🤖 AI Executive Summary
CVE-2016-20017 is a critical command injection vulnerability in D-Link DSL-2750B devices that allows remote, unauthenticated attackers to execute arbitrary commands via the login.cgi cli parameter. With a CVSS score of 9.0 and publicly available exploits, this vulnerability has been actively exploited in the wild. The vulnerability is particularly dangerous as it requires no authentication and can be exploited remotely, giving attackers full control over the affected device. Organizations using these legacy D-Link DSL devices should take immediate action to mitigate the risk.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 5, 2026 08:33
🇸🇦 Saudi Arabia Impact Assessment
D-Link DSL-2750B routers are commonly deployed in small-to-medium businesses and residential environments across Saudi Arabia, particularly by telecom providers (STC, Mobily, Zain) as customer premises equipment. Government sector offices, small banking branches, and healthcare clinics using legacy DSL infrastructure are at significant risk. Compromised devices can serve as entry points into internal networks, be recruited into botnets (Mirai variants have targeted this vulnerability), or be used for lateral movement. The energy sector and ARAMCO contractor networks using legacy networking equipment may also be affected. Saudi telecom operators providing these devices to customers bear responsibility for ensuring firmware updates or device replacements are deployed.
🏢 Affected Saudi Sectors
Telecommunications
Government
Banking
Healthcare
Energy
Small and Medium Enterprises
Education
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all D-Link DSL-2750B devices in your network using asset discovery scans
2. Restrict remote management access — disable WAN-side management interface immediately
3. Place affected devices behind a firewall and block external access to port 80/443 on these devices
4. Implement network segmentation to isolate affected devices
Patching Guidance:
5. Apply the latest firmware update from D-Link's support page for DSL-2750B
6. If the device has reached end-of-life (EOL), replace it with a supported device immediately
7. D-Link has discontinued support for many legacy devices — verify support status
Compensating Controls:
8. Deploy IDS/IPS rules to detect command injection attempts targeting login.cgi
9. Monitor for unusual outbound connections from DSL devices (botnet C2 traffic)
10. Implement web application firewall rules blocking malicious cli parameter values
Detection Rules:
- Alert on HTTP requests to login.cgi containing shell metacharacters (;, |, &&, backticks) in the cli parameter
- Monitor for unexpected process spawning on network devices
- Watch for Mirai-like scanning activity targeting port 80 on DSL devices
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة D-Link DSL-2750B في شبكتك باستخدام فحوصات اكتشاف الأصول
2. تقييد الوصول للإدارة عن بُعد — تعطيل واجهة الإدارة من جانب WAN فوراً
3. وضع الأجهزة المتأثرة خلف جدار حماية وحظر الوصول الخارجي للمنفذ 80/443
4. تطبيق تجزئة الشبكة لعزل الأجهزة المتأثرة
إرشادات التصحيح:
5. تطبيق آخر تحديث للبرنامج الثابت من صفحة دعم D-Link لجهاز DSL-2750B
6. إذا وصل الجهاز إلى نهاية عمره الافتراضي، استبدله بجهاز مدعوم فوراً
7. أوقفت D-Link دعم العديد من الأجهزة القديمة — تحقق من حالة الدعم
الضوابط التعويضية:
8. نشر قواعد IDS/IPS للكشف عن محاولات حقن الأوامر التي تستهدف login.cgi
9. مراقبة الاتصالات الصادرة غير العادية من أجهزة DSL (حركة مرور C2 لشبكات البوت)
10. تطبيق قواعد جدار حماية تطبيقات الويب لحظر قيم معامل cli الضارة
قواعد الكشف:
- التنبيه على طلبات HTTP إلى login.cgi التي تحتوي على أحرف shell خاصة في معامل cli
- مراقبة إنشاء العمليات غير المتوقعة على أجهزة الشبكة
- مراقبة نشاط المسح المشابه لـ Mirai الذي يستهدف المنفذ 80
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
2-3-1 (Asset Management)
2-5-1 (Network Security)
2-7-1 (Vulnerability Management)
2-9-1 (Cybersecurity Incident Management)
🔵 SAMA CSF
3.3.3 (Network Security Management)
3.3.5 (Vulnerability Management)
3.3.7 (Patch Management)
3.1.1 (Cybersecurity Risk Management)
🟡 ISO 27001:2022
A.8.9 (Configuration Management)
A.8.8 (Management of Technical Vulnerabilities)
A.8.20 (Networks Security)
A.8.21 (Security of Network Services)
🟣 PCI DSS v4.0
6.3.3 (Patching Security Vulnerabilities)
11.3 (External and Internal Vulnerability Scans)
1.3 (Network Access Controls)
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
D-Link:DSL-2750B Devices