📄 Description (English)
A flaw has been found in Edimax EW-7438RPn 1.31. Affected by this issue is the function formLicence of the file /goform/formLicence. This manipulation of the argument submit-url causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
🤖 AI Executive Summary
A critical stack-based buffer overflow vulnerability exists in Edimax EW-7438RPn wireless router firmware version 1.31, exploitable through the formLicence function via the submit-url parameter. With a CVSS score of 8.8 and no vendor patch available, this vulnerability poses significant risk to organizations relying on this networking equipment. The published exploit and vendor non-responsiveness elevate the urgency for immediate mitigation in Saudi networks.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 29, 2026 10:01
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability directly impacts Saudi organizations using Edimax EW-7438RPn routers in critical infrastructure. Primary risk sectors include: Banking and Financial Services (SAMA-regulated institutions using these devices for branch connectivity), Government agencies (NCA oversight), Telecommunications providers (STC, Mobily, Zain), Healthcare facilities, and Energy sector (ARAMCO and downstream operations). Remote code execution capability enables attackers to compromise network perimeters, intercept communications, and establish persistent access to internal systems. The lack of vendor support creates prolonged exposure for Saudi organizations.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Telecommunications
Healthcare
Energy and Utilities
Retail and E-commerce
Education
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Inventory all Edimax EW-7438RPn devices across your organization, particularly those in production networks
2. Isolate affected devices from critical network segments if possible, or implement network segmentation
3. Disable remote management features on the device (disable WAN access to administration interface)
4. Change default credentials and implement strong authentication
5. Monitor for suspicious traffic patterns to the device
PATCHING GUIDANCE:
- Contact Edimax support to verify if firmware updates beyond 1.31 are available
- If no patch is available, consider device replacement with alternative vendors (TP-Link, Netgear, Ubiquiti with active security support)
- Maintain firmware version documentation for compliance audits
COMPENSATING CONTROLS:
- Deploy Web Application Firewall (WAF) rules to block requests to /goform/formLicence endpoint
- Implement IDS/IPS signatures to detect buffer overflow attempts in submit-url parameter
- Restrict administrative access via IP whitelisting
- Enable detailed logging of all device access attempts
- Implement network segmentation to limit lateral movement if device is compromised
DETECTION RULES:
- Monitor for HTTP POST requests to /goform/formLicence with abnormally long submit-url parameters (>1024 bytes)
- Alert on any successful authentication to device management interface from unexpected sources
- Track firmware version changes and unauthorized configuration modifications
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حصر جميع أجهزة Edimax EW-7438RPn في المنظمة، خاصة في الشبكات الإنتاجية
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة أو تطبيق تقسيم الشبكة
3. تعطيل ميزات الإدارة عن بعد (تعطيل الوصول عبر WAN)
4. تغيير بيانات الاعتماد الافتراضية وتطبيق المصادقة القوية
5. مراقبة أنماط حركة المرور المريبة
إرشادات التصحيح:
- التواصل مع دعم Edimax للتحقق من توفر تحديثات البرامج الثابتة
- إذا لم يكن هناك تصحيح، استبدل الجهاز بموردين بدائل
- الاحتفاظ بتوثيق إصدار البرامج الثابتة
الضوابط البديلة:
- نشر قواعد جدار حماية تطبيقات الويب لحجب طلبات /goform/formLicence
- تطبيق توقيعات IDS/IPS للكشف عن محاولات تجاوز السعة
- تقييد الوصول الإداري عبر القوائم البيضاء
- تفعيل السجلات التفصيلية لجميع محاولات الوصول
- تطبيق تقسيم الشبكة لتحديد الحركة الجانبية
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.8.1 - Asset Management and Inventory Control
ECC 2024 A.8.2 - Information Security Perimeter
ECC 2024 A.12.6 - Management of Technical Vulnerabilities
ECC 2024 A.14.2 - System Development and Maintenance Security
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Physical Devices and Software Assets
SAMA CSF PR.AC-1 - Access Control Policy
SAMA CSF PR.PT-1 - Protective Technology
SAMA CSF DE.CM-1 - Network Monitoring
🟡 ISO 27001:2022
ISO 27001:2022 A.5.19 - Addressing Information Security in Supplier Relationships
ISO 27001:2022 A.8.1 - Inventory of Assets
ISO 27001:2022 A.8.2 - Ownership of Assets
ISO 27001:2022 A.12.6 - Management of Technical Vulnerabilities
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security Patches and Updates
PCI DSS 11.2 - Vulnerability Scanning