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Vulnerabilities

CVE-2026-6198

High
CWE-119 — Weakness Type
Published: Apr 13, 2026  ·  Modified: Apr 20, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A vulnerability has been found in Tenda F456 1.0.0.5. This issue affects the function fromNatStaticSetting of the file /goform/NatStaticSetting. The manipulation of the argument page leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

🤖 AI Executive Summary

A critical stack-based buffer overflow vulnerability exists in Tenda F456 router firmware (version 1.0.0.5) affecting the NatStaticSetting function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the 'page' parameter, with a CVSS score of 8.8. No patch is currently available, making immediate mitigation essential for Saudi organizations relying on this router model.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 11:33
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi telecommunications providers (STC, Mobily, Zain), small-to-medium enterprises (SMEs), and government agencies using Tenda F456 routers for network perimeter defense. Banking sector organizations and ARAMCO subsidiaries utilizing these routers for branch/facility connectivity face potential network compromise. Healthcare facilities and educational institutions in Saudi Arabia relying on this equipment are at elevated risk of unauthorized access and data exfiltration. The lack of available patches increases exposure window for critical infrastructure sectors regulated by NCA and SAMA.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain) Banking and Financial Services Government and Public Administration Energy and Utilities (ARAMCO subsidiaries) Healthcare Education Small-to-Medium Enterprises (SMEs) Retail and E-commerce
⚖️ Saudi Risk Score (AI)
8.6
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F456 devices in your network using asset inventory tools and network scanning
2. Isolate affected routers from critical network segments if possible, or implement network segmentation
3. Disable remote management features (WAN access) to the router's web interface immediately
4. Change default credentials and implement strong authentication if not already done
5. Monitor router logs for suspicious access attempts to /goform/NatStaticSetting endpoint

COMPENSATING CONTROLS:
1. Deploy Web Application Firewall (WAF) rules to block requests containing 'page' parameter manipulation to /goform/NatStaticSetting
2. Implement network-based IDS/IPS signatures to detect buffer overflow attempts
3. Restrict administrative access to router management interfaces via IP whitelisting
4. Enable router logging and forward logs to SIEM for real-time monitoring
5. Implement network segmentation to limit lateral movement if router is compromised

DETECTION RULES:
1. Monitor for HTTP POST requests to /goform/NatStaticSetting with oversized 'page' parameter values
2. Alert on any remote access attempts to router management interface from external IPs
3. Track unusual process execution or system calls originating from router processes
4. Monitor for unexpected outbound connections from router to external command-and-control servers

PATCHING GUIDANCE:
1. Contact Tenda support for firmware updates or security advisories
2. Consider replacement with alternative router models from vendors with active security support
3. Evaluate firmware alternatives if available from community sources (with caution)
4. Plan migration timeline to supported equipment within 30-60 days
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda F456 في شبكتك باستخدام أدوات جرد الأصول والمسح الشبكي
2. عزل أجهزة التوجيه المتأثرة عن القطاعات الشبكية الحرجة إن أمكن، أو تطبيق تقسيم الشبكة
3. تعطيل ميزات الإدارة البعيدة (الوصول عبر WAN) إلى واجهة الويب للجهاز فوراً
4. تغيير بيانات الاعتماد الافتراضية وتطبيق المصادقة القوية إن لم تكن مطبقة
5. مراقبة سجلات الجهاز للكشف عن محاولات الوصول المريبة إلى نقطة النهاية /goform/NatStaticSetting

الضوابط التعويضية:
1. نشر قواعد جدار حماية تطبيقات الويب (WAF) لحجب الطلبات التي تحتوي على معالجة معاملات 'page' إلى /goform/NatStaticSetting
2. تطبيق توقيعات نظام كشف/منع الاختراق (IDS/IPS) للكشف عن محاولات تجاوز المخزن المؤقت
3. تقييد الوصول الإداري إلى واجهات إدارة الجهاز عبر قائمة بيضاء للعناوين
4. تفعيل تسجيل الجهاز وإعادة توجيه السجلات إلى SIEM للمراقبة في الوقت الفعلي
5. تطبيق تقسيم الشبكة لتحديد الحركة الجانبية في حالة اختراق الجهاز

قواعد الكشف:
1. مراقبة طلبات HTTP POST إلى /goform/NatStaticSetting بقيم معاملات 'page' كبيرة الحجم
2. تنبيهات محاولات الوصول البعيد إلى واجهة إدارة الجهاز من عناوين IP خارجية
3. تتبع تنفيذ العمليات غير المعتادة أو استدعاءات النظام الناشئة من عمليات الجهاز
4. مراقبة الاتصالات الخارجية غير المتوقعة من الجهاز إلى خوادم التحكم والقيادة الخارجية

إرشادات التصحيح:
1. الاتصال بدعم Tenda للحصول على تحديثات البرامج الثابتة أو التنبيهات الأمنية
2. النظر في الاستبدال بنماذج جهاز توجيه بديلة من بائعين لديهم دعم أمني نشط
3. تقييم بدائل البرامج الثابتة إن توفرت من مصادر المجتمع (بحذر)
4. التخطيط لجدول زمني للهجرة إلى المعدات المدعومة خلال 30-60 يوماً
📋 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.DS-6 - Integrity Checking Mechanisms SAMA CSF DE.CM-1 - Network Monitoring 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 defined timeframe PCI DSS 11.2 - Run automated vulnerability scans PCI DSS 12.3 - Establish security policies for third-party service providers
📊 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
EPSS0.05%
Exploit No
Patch ✗ No
Published 2026-04-13
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
8.6
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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