📄 Description (English)
Realtek AP-Router SDK Buffer Overflow Vulnerability — Realtek AP-Router SDK HTTP web server boa contains a buffer overflow vulnerability due to unsafe copies of some overly long parameters submitted in the form that lead to denial-of-service (DoS).
🤖 AI Executive Summary
A critical buffer overflow vulnerability (CVSS 9.0) exists in Realtek AP-Router SDK's HTTP web server (boa) that allows remote attackers to cause denial-of-service through malformed HTTP requests with oversized form parameters. With public exploits available, this poses immediate risk to all organizations using Realtek-based networking equipment. Patching is urgent given the high severity and active exploit availability.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 21, 2026 00:33
🇸🇦 Saudi Arabia Impact Assessment
Saudi telecommunications operators (STC, Mobily, Zain) and ISPs using Realtek-based routers and access points face immediate DoS risk affecting network availability. Government agencies and critical infrastructure operators relying on Realtek networking equipment could experience service disruptions. Banking sector's network infrastructure may be impacted if Realtek devices are deployed in branch networks or data centers. Healthcare facilities using Realtek-based networking for medical systems could face operational disruptions. ARAMCO and energy sector SCADA networks may be vulnerable if Realtek equipment is present in network perimeters.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain)
Internet Service Providers
Government Agencies
Banking and Financial Services
Healthcare
Energy and Utilities (ARAMCO)
Critical Infrastructure
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Realtek AP-Router SDK deployments across your network infrastructure
2. Isolate or restrict external access to affected devices until patching is complete
3. Implement network segmentation to limit exposure of vulnerable devices
4. Monitor for suspicious HTTP requests with oversized form parameters
PATCHING GUIDANCE:
1. Apply Realtek security patches immediately to all affected devices
2. Verify firmware versions against Realtek's official security advisory
3. Test patches in non-production environment before deployment
4. Maintain backup configurations before applying patches
COMPENSATING CONTROLS (if patching delayed):
1. Deploy WAF rules to block HTTP requests with excessively large form parameters
2. Implement rate limiting on HTTP endpoints
3. Restrict administrative access to device web interfaces via IP whitelisting
4. Disable HTTP web interface if not required; use SSH/CLI only
DETECTION RULES:
1. Monitor for HTTP POST/GET requests with Content-Length > 8KB to router web interfaces
2. Alert on HTTP 500/502 errors from router devices indicating crashes
3. Track device reboots correlating with suspicious HTTP traffic patterns
4. Log all access attempts to /cgi-bin/ endpoints with oversized parameters
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع نشرات Realtek AP-Router SDK عبر البنية التحتية للشبكة
2. عزل أو تقييد الوصول الخارجي للأجهزة المتأثرة حتى اكتمال التصحيح
3. تنفيذ تقسيم الشبكة لتحديد التعرض للأجهزة الضعيفة
4. مراقبة طلبات HTTP المريبة ذات معاملات النموذج الكبيرة
إرشادات التصحيح:
1. تطبيق تصحيحات أمان Realtek فوراً على جميع الأجهزة المتأثرة
2. التحقق من إصدارات البرامج الثابتة مقابل استشارة أمان Realtek الرسمية
3. اختبار التصحيحات في بيئة غير الإنتاج قبل النشر
4. الاحتفاظ بنسخ احتياطية من التكوينات قبل تطبيق التصحيحات
الضوابط البديلة (إذا تأخر التصحيح):
1. نشر قواعد WAF لحظر طلبات HTTP ذات معاملات النموذج الكبيرة جداً
2. تنفيذ تحديد معدل على نقاط نهاية HTTP
3. تقييد الوصول الإداري لواجهات الويب للجهاز عبر قائمة بيضاء IP
4. تعطيل واجهة الويب HTTP إذا لم تكن مطلوبة؛ استخدم SSH/CLI فقط
قواعد الكشف:
1. مراقبة طلبات HTTP POST/GET مع Content-Length > 8KB لواجهات ويب الموجه
2. التنبيه على أخطاء HTTP 500/502 من أجهزة الموجه تشير إلى الأعطال
3. تتبع إعادة تشغيل الجهاز المرتبطة بأنماط حركة HTTP المريبة
4. تسجيل جميع محاولات الوصول إلى نقاط نهاية /cgi-bin/ مع معاملات كبيرة
📋 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 of system use
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification
PR.IP-12 - Security patch management
DE.CM-8 - Vulnerability scans and assessments
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities
A.14.2.1 - Secure development and change management
A.12.2.1 - Monitoring of system use
🟣 PCI DSS v4.0
Requirement 6.2 - Security patches for system components
Requirement 11.2 - Vulnerability scanning
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Realtek:AP-Router SDK