📄 Description (English)
A security vulnerability has been detected in Belkin F9K1122 1.00.33. This affects the function formSetSystemSettings of the file /goform/formSetSystemSettings of the component Setting Handler. Such manipulation of the argument webpage leads to stack-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly 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 Belkin F9K1122 router firmware version 1.00.33 affecting the /goform/formSetSystemSettings endpoint. The vulnerability allows remote unauthenticated attackers to execute arbitrary code with no patch available from the vendor. Given public exploit availability and widespread router deployment in Saudi networks, immediate mitigation is essential.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 13:57
🇸🇦 Saudi Arabia Impact Assessment
High impact on Saudi telecommunications infrastructure (STC, Mobily, Zain) and enterprise networks using Belkin F9K1122 routers as edge devices. Banking sector (SAMA-regulated institutions) at risk if routers used in branch connectivity. Government agencies and critical infrastructure operators exposed to remote code execution. Healthcare facilities using these routers for network access vulnerable to service disruption and data exfiltration. Energy sector (ARAMCO, utilities) potentially affected if routers deployed in operational technology networks.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Enterprise Networks
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Belkin F9K1122 devices running firmware 1.00.33 in your network using asset discovery tools
2. Isolate affected routers from critical network segments if possible
3. Implement network segmentation to restrict access to /goform/formSetSystemSettings endpoint
4. Enable detailed logging on affected devices and upstream security appliances
COMPENSATING CONTROLS (no patch available):
1. Deploy Web Application Firewall (WAF) rules blocking POST requests to /goform/formSetSystemSettings with oversized 'webpage' parameters
2. Implement rate limiting on the vulnerable endpoint
3. Restrict administrative access to router management interfaces via IP whitelisting
4. Monitor for suspicious HTTP requests with payloads >1024 bytes to the vulnerable endpoint
5. Consider replacing affected devices with patched alternatives from other vendors
DETECTION RULES:
- Alert on POST requests to /goform/formSetSystemSettings with 'webpage' parameter exceeding 512 bytes
- Monitor for unusual process execution on router devices following HTTP requests
- Track failed authentication attempts followed by direct endpoint access
- Flag any firmware modification attempts or unexpected device reboots
LONG-TERM:
1. Evaluate vendor security posture before procurement
2. Establish firmware update procedures and testing protocols
3. Implement network access controls for management interfaces
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Belkin F9K1122 التي تعمل بالإصدار 1.00.33 في شبكتك
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة في الشبكة إن أمكن
3. تطبيق تقسيم الشبكة لتقييد الوصول إلى نقطة النهاية /goform/formSetSystemSettings
4. تفعيل السجلات التفصيلية على الأجهزة المتأثرة وأجهزة الأمان العلوية
الضوابط البديلة (لا يوجد تصحيح متاح):
1. نشر قواعد جدار حماية تطبيقات الويب لحجب طلبات POST بمعاملات 'webpage' كبيرة الحجم
2. تطبيق تحديد معدل الطلبات على نقطة النهاية الضعيفة
3. تقييد الوصول الإداري عبر قائمة بيضاء للعناوين
4. مراقبة الطلبات المريبة بحمولات تتجاوز 512 بايت
5. استبدال الأجهزة المتأثرة بأجهزة محدثة من بائعين آخرين
قواعد الكشف:
- تنبيهات على طلبات POST بمعاملات تتجاوز 512 بايت
- مراقبة تنفيذ العمليات غير المعتادة على الأجهزة
- تتبع محاولات المصادقة الفاشلة
- تحديد محاولات تعديل البرنامج الثابت
المدى الطويل:
1. تقييم موقف الأمان للبائع قبل الشراء
2. إنشاء إجراءات تحديث البرنامج الثابت
3. تطبيق ضوابط الوصول للواجهات الإدارية
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.8.1 - Asset Management and Inventory Control
ECC 2024 A.12.6 - Management of Technical Vulnerabilities
ECC 2024 A.14.2 - System Development and Change Management
ECC 2024 A.13.1 - Network Security
🔵 SAMA CSF
ID.RA-1 - Asset Management
PR.DS-6 - Integrity Monitoring
DE.CM-1 - Network Monitoring
RS.MI-1 - Incident Response Planning
🟡 ISO 27001:2022
A.8.1.1 - Inventory of Assets
A.12.6.1 - Management of Technical Vulnerabilities
A.13.1.1 - Network Controls
A.14.2.1 - Change Management Procedures
🟣 PCI DSS v4.0.1
Requirement 1.1 - Firewall Configuration Standards
Requirement 6.2 - Security Patches and Updates
Requirement 11.2 - Vulnerability Scanning
🔗 References & Sources 4
🔗
https://github.com/Litengzheng/vul_db/blob/main/Belkin/vul_155/README.md
cna@vuldb.com
Exploit
Third Party Advisory
🔗
https://vuldb.com/submit/779125
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/353967
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/vuln/353967/cti
cna@vuldb.com
Permissions Required
VDB Entry
📦 Affected Products / CPE 1 entries
belkin:f9k1122_firmware:1.00.33