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Vulnerabilities

CVE-2026-5567

High
CWE-119 — Weakness Type
Published: Apr 5, 2026  ·  Modified: Apr 12, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A flaw has been found in Tenda M3 1.0.0.10. This vulnerability affects the function setAdvPolicyData of the file /goform/setAdvPolicyData of the component Destination Handler. Executing a manipulation of the argument policyType can lead to buffer overflow. The attack can be executed remotely. The exploit has been published and may be used.

🤖 AI Executive Summary

A critical buffer overflow vulnerability (CVE-2026-5567) exists in Tenda M3 router firmware version 1.0.0.10 affecting the setAdvPolicyData function. The flaw allows remote attackers to execute arbitrary code by manipulating the policyType parameter, with a CVSS score of 8.8. No patch is currently available, making immediate mitigation essential for organizations relying on this equipment.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 18:07
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations, particularly: (1) Banking sector — if Tenda M3 routers are used in branch networks or as edge devices for network segmentation; (2) Government agencies and NCA-regulated entities — potential compromise of network infrastructure; (3) Telecommunications providers (STC, Mobily, Zain) — if deployed in network infrastructure; (4) Healthcare institutions — potential disruption of medical systems; (5) Energy sector (ARAMCO, utilities) — if used in operational technology networks. The lack of available patches creates extended exposure window.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Telecommunications Healthcare Energy and Utilities Critical Infrastructure
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda M3 1.0.0.10 devices in your network using network scanning tools (nmap, Shodan queries)
2. Isolate affected devices from critical network segments if possible
3. Implement network-level access controls restricting access to /goform/setAdvPolicyData endpoint
4. Monitor for exploitation attempts using IDS/IPS signatures

COMPENSATING CONTROLS:
1. Deploy WAF rules blocking POST requests to /goform/setAdvPolicyData with suspicious policyType values
2. Implement strict input validation at network perimeter
3. Segment networks to limit lateral movement from compromised routers
4. Enable detailed logging of all HTTP requests to the affected endpoint
5. Restrict administrative access to router management interfaces

DETECTION RULES:
1. Monitor for HTTP POST requests to /goform/setAdvPolicyData with policyType parameter containing buffer overflow payloads (long strings, special characters)
2. Alert on any successful authentication followed by setAdvPolicyData calls
3. Track firmware version of Tenda M3 devices; flag version 1.0.0.10
4. Monitor for unusual process execution or network connections originating from router IP addresses

PATCHING STRATEGY:
1. Contact Tenda support for security updates or firmware patches
2. Prepare replacement devices (alternative router models from trusted vendors)
3. Schedule replacement during maintenance windows
4. Test any available firmware updates in isolated lab environment before deployment
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda M3 1.0.0.10 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan)
2. عزل الأجهزة المتأثرة عن قطاعات الشبكة الحرجة إن أمكن
3. تطبيق عناصر التحكم في الوصول على مستوى الشبكة لتقييد الوصول إلى نقطة النهاية /goform/setAdvPolicyData
4. مراقبة محاولات الاستغلال باستخدام توقيعات IDS/IPS

عناصر التحكم التعويضية:
1. نشر قواعد WAF لحجب طلبات POST إلى /goform/setAdvPolicyData بقيم policyType مريبة
2. تطبيق التحقق الصارم من صحة الإدخال على محيط الشبكة
3. تقسيم الشبكات لتحديد الحركة الجانبية من أجهزة التوجيه المخترقة
4. تفعيل تسجيل مفصل لجميع طلبات HTTP إلى نقطة النهاية المتأثرة
5. تقييد الوصول الإداري إلى واجهات إدارة جهاز التوجيه

قواعد الكشف:
1. مراقبة طلبات HTTP POST إلى /goform/setAdvPolicyData بمعامل policyType يحتوي على حمولات تجاوز المخزن المؤقت
2. تنبيه عند أي مصادقة ناجحة متبوعة باستدعاءات setAdvPolicyData
3. تتبع إصدار البرنامج الثابت لأجهزة Tenda M3؛ وضع علامة على الإصدار 1.0.0.10
4. مراقبة تنفيذ العمليات غير العادية أو الاتصالات الشبكية من عناوين IP لجهاز التوجيه

استراتيجية التصحيح:
1. الاتصال بدعم Tenda للحصول على تحديثات الأمان أو تصحيحات البرنامج الثابت
2. تحضير أجهزة بديلة (نماذج جهاز توجيه بديلة من بائعين موثوقين)
3. جدولة الاستبدال خلال نوافذ الصيانة
4. اختبار أي تحديثات برنامج ثابت متاحة في بيئة معملية معزولة قبل النشر
📋 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 access
🔵 SAMA CSF
SAMA CSF ID.RA-1 — Asset Management and Vulnerability Assessment SAMA CSF PR.IP-12 — Security patch management SAMA CSF DE.CM-1 — Detection and monitoring of anomalous activity
🟡 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 patch management PCI DSS 11.2 — Vulnerability scanning and assessment
📊 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 2026-04-05
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
8.5
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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