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Vulnerabilities

CVE-2026-9401

High
CWE-119 — Weakness Type
Published: May 24, 2026  ·  Modified: May 31, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A vulnerability has been found in Edimax BR-6675nD 1.12. Impacted is the function formWanTcpipSetup of the file /goform/formWanTcpipSetup of the component POST Request Handler. The manipulation of the argument pppUserName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

🤖 AI Executive Summary

A critical buffer overflow vulnerability (CVE-2026-9401) exists in Edimax BR-6675nD router firmware version 1.12 affecting the WAN TCP/IP setup function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the pppUserName parameter in POST requests. With a CVSS score of 8.8 and public exploit disclosure, this poses an immediate threat to organizations using this router model, particularly in network perimeter security.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 27, 2026 17:40
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi telecommunications providers (STC, Mobily, Zain) and ISPs that deploy Edimax BR-6675nD routers in customer premises or network infrastructure. Government agencies (NCA, CITC) managing network security are at risk if these routers are used in critical infrastructure. Banking sector (SAMA-regulated institutions) could be affected if routers are deployed in branch networks or as VPN endpoints. Healthcare organizations using these routers for network connectivity face potential data breach risks. The lack of vendor response and available patches significantly elevates risk for all affected sectors.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain) Internet Service Providers Government (NCA, CITC) Banking and Financial Services (SAMA-regulated) Healthcare Energy (ARAMCO subsidiaries) Education Retail and E-commerce
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Edimax BR-6675nD routers (firmware 1.12) in your network using network scanning tools
2. Isolate affected routers from critical systems and segment network access
3. Implement network-level access controls restricting access to router management interfaces
4. Monitor for suspicious POST requests to /goform/formWanTcpipSetup endpoint

PATCHING GUIDANCE:
1. Check Edimax support portal for firmware updates beyond version 1.12
2. If no patch available, plan immediate hardware replacement with alternative vendor routers
3. Contact Edimax support directly requesting security patch status

COMPENSATING CONTROLS:
1. Deploy Web Application Firewall (WAF) rules blocking POST requests with oversized pppUserName parameters
2. Implement strict input validation at network boundary
3. Restrict administrative access to router management interfaces via VPN only
4. Enable detailed logging of all POST requests to /goform/ endpoints
5. Implement network segmentation isolating router management traffic

DETECTION RULES:
1. Alert on POST requests to /goform/formWanTcpipSetup with pppUserName parameter exceeding 256 bytes
2. Monitor for unexpected process execution or system crashes on router
3. Track failed authentication attempts to router management interface
4. Log and alert on any firmware modification attempts
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة التوجيه Edimax BR-6675nD (الإصدار 1.12) في شبكتك باستخدام أدوات المسح
2. عزل أجهزة التوجيه المتأثرة عن الأنظمة الحرجة وتقسيم الوصول إلى الشبكة
3. تطبيق عناصر تحكم الوصول على مستوى الشبكة لتقييد الوصول إلى واجهات إدارة جهاز التوجيه
4. مراقبة طلبات POST المريبة إلى نقطة النهاية /goform/formWanTcpipSetup

إرشادات التصحيح:
1. التحقق من بوابة دعم Edimax للحصول على تحديثات البرامج الثابتة بعد الإصدار 1.12
2. إذا لم يكن هناك تصحيح متاح، خطط لاستبدال الأجهزة الفوري بأجهزة توجيه من بائعين آخرين
3. الاتصال بدعم Edimax مباشرة للاستفسار عن حالة التصحيح الأمني

عناصر التحكم البديلة:
1. نشر قواعد جدار حماية تطبيقات الويب (WAF) لحظر طلبات POST بمعاملات pppUserName كبيرة الحجم
2. تطبيق التحقق الصارم من المدخلات على حدود الشبكة
3. تقييد الوصول الإداري إلى واجهات إدارة جهاز التوجيه عبر VPN فقط
4. تفعيل تسجيل مفصل لجميع طلبات POST إلى نقاط نهاية /goform/
5. تطبيق تقسيم الشبكة لعزل حركة إدارة جهاز التوجيه

قواعد الكشف:
1. تنبيه على طلبات POST إلى /goform/formWanTcpipSetup مع معامل pppUserName يتجاوز 256 بايت
2. مراقبة تنفيذ العمليات غير المتوقعة أو أعطال النظام على جهاز التوجيه
3. تتبع محاولات المصادقة الفاشلة لواجهة إدارة جهاز التوجيه
4. تسجيل والتنبيه على أي محاولات تعديل البرامج الثابتة
📋 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 resources ECC 2024 A.6.2.1 - Vulnerability management and patching ECC 2024 A.8.2.3 - Monitoring and logging of network devices
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Asset management and inventory SAMA CSF PR.AC-1 - Access control policies SAMA CSF PR.PT-1 - Security awareness and training SAMA CSF DE.CM-1 - Detection and monitoring systems
🟡 ISO 27001:2022
ISO 27001:2022 A.5.15 - Supplier relationships ISO 27001:2022 A.8.1 - Information security policies ISO 27001:2022 A.8.6 - Management of technical vulnerabilities ISO 27001:2022 A.8.23 - Information security incident management
🟣 PCI DSS v4.0.1
PCI DSS 1.1 - Firewall configuration standards PCI DSS 2.1 - Default security parameters PCI DSS 6.2 - Security patches and updates PCI DSS 11.2 - Vulnerability scanning
📊 CVSS Score
8.8
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.8
CWECWE-119
EPSS0.04%
Exploit No
Patch ✗ No
Published 2026-05-24
Source Feed nvd
🇸🇦 Saudi Risk Score
8.9
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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