📄 Description (English)
A vulnerability was determined in Tenda AC5 15.03.06.47. The affected element is the function decodePwd of the file /goform/WizardHandle of the component POST Request Handler. Executing a manipulation of the argument WANT/WANS can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized.
🤖 AI Executive Summary
A critical stack-based buffer overflow vulnerability exists in Tenda AC5 router firmware (version 15.03.06.47) affecting the WizardHandle POST request handler. The vulnerability can be exploited remotely without authentication to execute arbitrary code, with public exploits already available. This poses an immediate threat to organizations and individuals using this widely-deployed router model across Saudi Arabia.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 13:54
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability critically impacts Saudi organizations across multiple sectors: Banking and financial institutions (SAMA-regulated) relying on Tenda routers for network infrastructure; Government agencies (NCA oversight) using these devices in critical networks; Telecommunications providers (STC, Mobily) deploying Tenda equipment in customer networks; Healthcare facilities requiring secure network connectivity; Energy sector (ARAMCO-related) using these routers in operational technology networks. SMEs and government entities are particularly vulnerable due to widespread Tenda router adoption for cost-effective networking solutions.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Telecommunications
Healthcare
Energy and Utilities
Small and Medium Enterprises
Education
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda AC5 devices running firmware 15.03.06.47 in your network using network scanning tools
2. Isolate affected routers from critical network segments if possible
3. Disable remote management features and restrict WizardHandle access via firewall rules
4. Monitor for suspicious POST requests to /goform/WizardHandle endpoint
PATCHING GUIDANCE:
1. Check Tenda's official website for firmware updates beyond 15.03.06.47
2. If no patch available, plan immediate hardware replacement with alternative vendors
3. Implement firmware update procedures with verified checksums
COMPENSATING CONTROLS:
1. Deploy Web Application Firewall (WAF) rules blocking POST requests with oversized WANT/WANS parameters
2. Implement network segmentation isolating router management interfaces
3. Enable access control lists (ACLs) restricting WizardHandle access to trusted IPs only
4. Deploy intrusion detection signatures for buffer overflow attempts
DETECTION RULES:
1. Monitor for POST requests to /goform/WizardHandle with WANT/WANS parameters exceeding normal lengths (>256 bytes)
2. Alert on stack-based exception errors from Tenda devices
3. Track firmware version inventory and flag 15.03.06.47 instances
4. Monitor for unauthorized configuration changes via WizardHandle
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda AC5 التي تعمل بالإصدار 15.03.06.47 في شبكتك باستخدام أدوات فحص الشبكة
2. عزل أجهزة التوجيه المتأثرة عن أجزاء الشبكة الحرجة إن أمكن
3. تعطيل ميزات الإدارة البعيدة وتقييد وصول WizardHandle عبر قواعد جدار الحماية
4. مراقبة طلبات POST المريبة إلى نقطة نهاية /goform/WizardHandle
إرشادات التصحيح:
1. تحقق من موقع Tenda الرسمي للحصول على تحديثات البرنامج الثابت بعد 15.03.06.47
2. إذا لم يكن هناك تصحيح متاح، خطط لاستبدال الأجهزة الفورية بموردين بدائل
3. تنفيذ إجراءات تحديث البرنامج الثابت مع قيم التحقق المعتمدة
الضوابط البديلة:
1. نشر قواعد جدار تطبيقات الويب (WAF) لحظر طلبات POST بمعاملات WANT/WANS كبيرة الحجم
2. تنفيذ تقسيم الشبكة لعزل واجهات إدارة جهاز التوجيه
3. تفعيل قوائم التحكم في الوصول (ACLs) لتقييد وصول WizardHandle إلى عناوين IP موثوقة فقط
4. نشر توقيعات كشف الاختراق لمحاولات تجاوز المخزن المؤقت
قواعد الكشف:
1. مراقبة طلبات POST إلى /goform/WizardHandle مع معاملات WANT/WANS تتجاوز الأطوال العادية (>256 بايت)
2. تنبيه على أخطاء الاستثناءات المستندة إلى المكدس من أجهزة Tenda
3. تتبع جرد إصدار البرنامج الثابت وتحديد مثيلات 15.03.06.47
4. مراقبة التغييرات غير المصرح بها في التكوين عبر WizardHandle
📋 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 network activities
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset management and vulnerability identification
SAMA CSF PR.PT-2 - System and information integrity
SAMA CSF DE.CM-1 - Detection and monitoring of anomalies
🟡 ISO 27001:2022
ISO 27001:2022 A.12.2.1 - Monitoring and logging
ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities
ISO 27001:2022 A.14.2.1 - Secure development and change management
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patches and updates
PCI DSS 11.2 - Vulnerability scanning and assessment
🔗 References & Sources 5
🔗
https://lavender-bicycle-a5a.notion.site/Tenda_AC5_WizardHandle_PPW-32053a41781f80cab09...
cna@vuldb.com
Exploit
Third Party Advisory
🔗
https://vuldb.com/?ctiid.353657
cna@vuldb.com
Permissions Required
VDB Entry
🔗
https://vuldb.com/?id.353657
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://vuldb.com/?submit.777394
cna@vuldb.com
Third Party Advisory
VDB Entry
🔗
https://www.tenda.com.cn/
cna@vuldb.com
Product
📦 Affected Products / CPE 1 entries
tenda:ac5_firmware:15.03.06.47