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Vulnerabilities

CVE-2026-9426

High
CWE-119 — Weakness Type
Published: May 25, 2026  ·  Modified: Jun 1, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A vulnerability was detected in Edimax EW-7438RPn 1.31. This affects the function formHwSet of the file /goform/formHwSet. The manipulation of the argument Anntena/Mcs/regDomain/nic0Addr/nic1Addr/wlanAddr/wanAddr/wlanSSID/wlanChan/initgain/txcck/txofdm/submit-url results in stack-based buffer overflow. The attack can be executed remotely. The exploit is now 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 stack-based buffer overflow vulnerability exists in Edimax EW-7438RPn wireless router firmware version 1.31, affecting the /goform/formHwSet endpoint. The vulnerability allows remote attackers to execute arbitrary code by manipulating multiple configuration parameters without authentication. With no patch available and public exploit details emerging, this poses an immediate threat to organizations using this router model in their network infrastructure.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 28, 2026 16:49
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations across multiple sectors face significant risk: Telecommunications (STC, Mobily, Zain) using Edimax routers for network infrastructure; Banking sector (SAMA-regulated institutions) with branch connectivity; Government agencies (NCA oversight) managing network perimeter devices; Healthcare facilities requiring secure network access; Energy sector (ARAMCO, utilities) with operational technology networks. The lack of vendor response and public exploit availability elevates risk for all affected deployments. Organizations in critical infrastructure sectors are particularly vulnerable to remote code execution leading to network compromise, data exfiltration, and operational disruption.
🏢 Affected Saudi Sectors
Telecommunications Banking and Financial Services Government and Public Administration Healthcare Energy and Utilities Retail and E-commerce Education
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Edimax EW-7438RPn devices running firmware 1.31 in your network inventory
2. Isolate affected devices from critical network segments if possible
3. Implement network segmentation to restrict access to the /goform/formHwSet endpoint
4. Monitor for suspicious HTTP POST requests to /goform/formHwSet with unusual parameter values

COMPENSATING CONTROLS (until patch available):
1. Deploy Web Application Firewall (WAF) rules to block requests containing buffer overflow payloads to /goform/formHwSet
2. Restrict administrative access to router management interfaces via IP whitelisting
3. Disable remote management features if not required
4. Implement network-level access controls limiting device communication
5. Change default credentials immediately

DETECTION RULES:
1. Monitor for POST requests to /goform/formHwSet with parameter lengths exceeding normal ranges
2. Alert on requests containing special characters or encoded payloads in Antenna, Mcs, regDomain, nic0Addr, nic1Addr, wlanAddr, wanAddr, wlanSSID, wlanChan, initgain, txcck, txofdm parameters
3. Track failed authentication attempts followed by direct /goform/formHwSet access
4. Monitor for unexpected process execution or system calls from router processes

LONG-TERM:
1. Contact Edimax support for firmware updates or replacement devices
2. Plan migration to alternative router models with active vendor support
3. Implement continuous firmware monitoring for security updates
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Edimax EW-7438RPn التي تعمل بالإصدار 1.31 في جرد الشبكة
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة في الشبكة إن أمكن
3. تطبيق تقسيم الشبكة لتقييد الوصول إلى نقطة النهاية /goform/formHwSet
4. مراقبة طلبات HTTP POST المريبة إلى /goform/formHwSet بقيم معاملات غير عادية

الضوابط التعويضية (حتى توفر التصحيح):
1. نشر قواعد جدار حماية تطبيقات الويب لحجب الطلبات التي تحتوي على حمولات تجاوز المخزن المؤقت
2. تقييد الوصول الإداري إلى واجهات إدارة جهاز التوجيه عبر قائمة بيضاء للعناوين
3. تعطيل ميزات الإدارة البعيدة إذا لم تكن مطلوبة
4. تطبيق ضوابط الوصول على مستوى الشبكة لتقييد اتصالات الأجهزة
5. تغيير بيانات الاعتماد الافتراضية فوراً

قواعد الكشف:
1. مراقبة طلبات POST إلى /goform/formHwSet بأطوال معاملات تتجاوز النطاقات العادية
2. تنبيهات على الطلبات التي تحتوي على أحرف خاصة أو حمولات مشفرة في المعاملات
3. تتبع محاولات المصادقة الفاشلة متبوعة بالوصول المباشر إلى /goform/formHwSet
4. مراقبة تنفيذ العمليات غير المتوقعة من عمليات جهاز التوجيه

المدى الطويل:
1. الاتصال بدعم Edimax للحصول على تحديثات البرامج الثابتة أو أجهزة بديلة
2. التخطيط للهجرة إلى نماذج أجهزة توجيه بديلة مع دعم بائع نشط
3. تطبيق مراقبة مستمرة للبرامج الثابتة للتحديثات الأمنية
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.12.6.1 - Management of technical vulnerabilities ECC 2024 A.14.2.1 - Secure development policy ECC 2024 A.12.2.1 - Monitoring and logging of access ECC 2024 A.13.1.3 - Segregation of networks
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset Management and Inventory SAMA CSF PR.IP-12 - Security patch management SAMA CSF DE.CM-1 - Network monitoring and anomaly detection SAMA CSF RS.MI-2 - Incident response and containment
🟡 ISO 27001:2022
ISO 27001:2022 A.12.3.1 - Configuration management ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities ISO 27001:2022 A.14.2.1 - Secure development and change management ISO 27001:2022 A.8.1.1 - Inventory of assets
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patch management PCI DSS 11.2 - Vulnerability scanning PCI DSS 1.1 - Firewall configuration standards
📊 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 2026-05-25
Source Feed nvd
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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