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Vulnerabilities

CVE-2026-9403

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 was determined in Edimax BR-6675nD 1.12. The impacted element is the function formWlSiteSurvey of the file /goform/formWlSiteSurvey of the component POST Request Handler. This manipulation of the argument selSSID causes buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

🤖 AI Executive Summary

A critical buffer overflow vulnerability exists in Edimax BR-6675nD wireless router firmware version 1.12 affecting the Wi-Fi site survey function. The vulnerability allows remote attackers to execute arbitrary code by sending a malicious POST request with an oversized selSSID parameter. With no patch available and public exploit disclosure, this poses an immediate threat to organizations using this router model for network access and management.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 27, 2026 17:39
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations across multiple sectors: Banking and Financial Services (SAMA-regulated entities) using these routers for branch connectivity and remote access; Government agencies (NCA oversight) relying on network infrastructure; Telecommunications providers (STC, Mobily) managing network equipment; Healthcare institutions requiring secure network access; and Energy sector (ARAMCO, utilities) using industrial networking. The lack of vendor support and patch availability makes this particularly critical for organizations unable to immediately replace affected equipment.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Telecommunications Healthcare Energy and Utilities Retail and E-commerce Education Manufacturing
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all Edimax BR-6675nD devices running firmware version 1.12 in your network inventory
2. Isolate affected routers from critical network segments if replacement is not immediately possible
3. Restrict administrative access to the router's web interface to trusted IP addresses only
4. Disable remote management features if not essential for operations

Patching Guidance:
1. Contact Edimax support to determine if firmware updates beyond 1.12 are available
2. If updates exist, test in non-production environment before deployment
3. If no patches available, plan immediate replacement with alternative router models from vendors with active security support

Compensating Controls:
1. Deploy network segmentation to isolate router management traffic
2. Implement Web Application Firewall (WAF) rules to block oversized POST requests to /goform/formWlSiteSurvey
3. Monitor for suspicious POST requests with abnormally large selSSID parameters
4. Implement rate limiting on the affected endpoint
5. Use VPN for all remote administrative access instead of direct web interface access

Detection Rules:
1. Monitor for POST requests to /goform/formWlSiteSurvey with selSSID parameter exceeding 256 bytes
2. Alert on any successful code execution attempts from router management interfaces
3. Track firmware version of all Edimax devices; flag version 1.12 for immediate action
4. Monitor router process execution for unexpected child processes spawned from web service
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Edimax BR-6675nD التي تعمل بإصدار البرنامج الثابت 1.12 في جرد الشبكة الخاص بك
2. عزل أجهزة التوجيه المتأثرة عن قطاعات الشبكة الحرجة إذا لم يكن الاستبدال ممكناً على الفور
3. تقييد الوصول الإداري إلى واجهة الويب للموجه إلى عناوين IP موثوقة فقط
4. تعطيل ميزات الإدارة البعيدة إذا لم تكن ضرورية للعمليات

إرشادات التصحيح:
1. الاتصال بدعم Edimax لتحديد ما إذا كانت تحديثات البرنامج الثابت متاحة بعد الإصدار 1.12
2. إذا كانت التحديثات موجودة، اختبرها في بيئة غير الإنتاج قبل النشر
3. إذا لم تكن هناك تصحيحات متاحة، خطط للاستبدال الفوري بنماذج موجهات بديلة من البائعين الذين لديهم دعم أمان نشط

الضوابط التعويضية:
1. نشر تقسيم الشبكة لعزل حركة إدارة الموجه
2. تنفيذ قواعد جدار حماية تطبيقات الويب (WAF) لحظر طلبات POST ذات الحجم الزائد إلى /goform/formWlSiteSurvey
3. مراقبة طلبات POST المريبة بمعاملات selSSID كبيرة بشكل غير طبيعي
4. تنفيذ تحديد معدل على نقطة النهاية المتأثرة
5. استخدام VPN لجميع الوصول الإداري البعيد بدلاً من الوصول المباشر إلى واجهة الويب

قواعد الكشف:
1. مراقبة طلبات POST إلى /goform/formWlSiteSurvey مع معامل selSSID يتجاوز 256 بايت
2. تنبيه عند أي محاولات تنفيذ كود ناجحة من واجهات إدارة الموجه
3. تتبع إصدار البرنامج الثابت لجميع أجهزة Edimax؛ وضع علامة على الإصدار 1.12 للإجراء الفوري
4. مراقبة عمليات الموجه لعمليات فرعية غير متوقعة تم إنشاؤها من خدمة الويب
📋 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 Change Management
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Physical Devices and Software Assets SAMA CSF PR.IP-12 - Software Development Security SAMA CSF DE.CM-8 - Vulnerability Scans SAMA CSF RS.MI-2 - Incidents are mitigated
🟡 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.8.6 - Management of technical vulnerabilities
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Ensure security patches are installed within one month of release PCI DSS 11.2 - Run automated vulnerability scanning tools regularly
📊 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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