📄 Description (English)
A vulnerability was identified in Tenda AC15 15.03.05.18. This affects the function websGetVar of the file /goform/SysToolChangePwd. Such manipulation of the argument oldPwd/newPwd/cfmPwd leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.
🤖 AI Executive Summary
A critical stack-based buffer overflow vulnerability exists in Tenda AC15 routers (version 15.03.05.18) affecting the password change function. The vulnerability allows remote attackers to execute arbitrary code by manipulating password parameters without authentication. With CVSS 8.8 and publicly available exploit code, this poses an immediate threat to organizations using these devices.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 20:17
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using Tenda AC15 routers face critical risk, particularly: (1) Banking sector and SAMA-regulated institutions relying on these devices for network perimeter security; (2) Government agencies and NCA-monitored entities using Tenda equipment in critical infrastructure; (3) Telecom providers (STC, Mobily, Zain) and ISPs using these routers in customer networks; (4) Healthcare facilities and SEHA-connected organizations; (5) Energy sector and ARAMCO-affiliated companies. The lack of authentication requirement and remote exploitability makes this particularly dangerous for organizations with internet-facing Tenda devices.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Telecommunications
Healthcare
Energy and Utilities
Critical Infrastructure
Education
Retail and E-commerce
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda AC15 devices in your network using network scanning tools (nmap, Shodan queries for Tenda devices)
2. Isolate affected devices from internet-facing positions immediately
3. Disable remote management features on Tenda AC15 routers
4. Implement network segmentation to restrict access to router management interfaces
PATCHING GUIDANCE:
1. Check Tenda's official website for firmware updates beyond 15.03.05.18
2. If no patch is available, plan device replacement with alternative vendors (Cisco, Fortinet, Ubiquiti)
3. Document all affected devices and create replacement timeline
COMPENSATING CONTROLS:
1. Deploy WAF/IPS rules to block requests to /goform/SysToolChangePwd endpoint
2. Implement strict firewall rules limiting access to router management ports (80, 443, 8080)
3. Enable router access logs and monitor for suspicious password change attempts
4. Deploy network-based intrusion detection signatures for CVE-2026-5830 exploitation attempts
5. Implement VPN requirement for any remote router management
DETECTION RULES:
1. Monitor for POST requests to /goform/SysToolChangePwd with abnormally long parameter values
2. Alert on any successful password changes without corresponding admin login events
3. Track failed authentication attempts followed by successful parameter manipulation
4. Monitor for stack overflow indicators in router logs (segmentation faults, unexpected restarts)
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda AC15 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan)
2. عزل الأجهزة المتأثرة عن المواقع المواجهة للإنترنت فوراً
3. تعطيل ميزات الإدارة البعيدة على أجهزة التوجيه Tenda AC15
4. تطبيق تقسيم الشبكة لتقييد الوصول إلى واجهات إدارة التوجيه
إرشادات التصحيح:
1. التحقق من موقع Tenda الرسمي للحصول على تحديثات البرامج الثابتة بعد 15.03.05.18
2. إذا لم يكن هناك تصحيح متاح، خطط لاستبدال الجهاز بموردين بدلاء
3. توثيق جميع الأجهزة المتأثرة وإنشاء جدول زمني للاستبدال
الضوابط البديلة:
1. نشر قواعد WAF/IPS لحجب الطلبات إلى نقطة نهاية /goform/SysToolChangePwd
2. تطبيق قواعد جدار الحماية الصارمة لتقييد الوصول إلى منافذ إدارة التوجيه
3. تفعيل سجلات وصول التوجيه ومراقبة محاولات تغيير كلمة المرور المريبة
4. نشر توقيعات كشف الاختراق على مستوى الشبكة
5. تطبيق متطلبات VPN لأي إدارة بعيدة للتوجيه
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Network security perimeter controls
ECC 2024 A.6.2.1 - User access management and authentication
ECC 2024 A.8.2.3 - Removal of access rights
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Asset management and inventory
SAMA CSF PR.AC-1 - Access control policy and procedures
SAMA CSF PR.PT-1 - Security awareness and training
SAMA CSF DE.CM-1 - Detection and analysis of anomalies
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for information security
ISO 27001:2022 A.8.1 - User endpoint devices
ISO 27001:2022 A.8.2 - Privileged access rights
ISO 27001:2022 A.12.6 - Management of technical vulnerabilities
🟣 PCI DSS v4.0.1
PCI DSS 1.1 - Firewall configuration standards
PCI DSS 2.1 - Default security parameters
PCI DSS 6.2 - Security patches and updates