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Global phishing Financial Services, Technology, Multiple Sectors CRITICAL 1h Global insider Education HIGH 19h Global supply_chain Software Development and Technology HIGH 1d Global apt Government/Critical Infrastructure CRITICAL 1d Global vulnerability Enterprise Software / Data Analytics CRITICAL 1d Global vulnerability Artificial Intelligence and Technology HIGH 1d Global general Technology and Artificial Intelligence MEDIUM 1d Global general Technology and Artificial Intelligence HIGH 1d Global vulnerability Higher Education CRITICAL 1d Global data_breach Government HIGH 1d Global phishing Financial Services, Technology, Multiple Sectors CRITICAL 1h Global insider Education HIGH 19h Global supply_chain Software Development and Technology HIGH 1d Global apt Government/Critical Infrastructure CRITICAL 1d Global vulnerability Enterprise Software / Data Analytics CRITICAL 1d Global vulnerability Artificial Intelligence and Technology HIGH 1d Global general Technology and Artificial Intelligence MEDIUM 1d Global general Technology and Artificial Intelligence HIGH 1d Global vulnerability Higher Education CRITICAL 1d Global data_breach Government HIGH 1d Global phishing Financial Services, Technology, Multiple Sectors CRITICAL 1h Global insider Education HIGH 19h Global supply_chain Software Development and Technology HIGH 1d Global apt Government/Critical Infrastructure CRITICAL 1d Global vulnerability Enterprise Software / Data Analytics CRITICAL 1d Global vulnerability Artificial Intelligence and Technology HIGH 1d Global general Technology and Artificial Intelligence MEDIUM 1d Global general Technology and Artificial Intelligence HIGH 1d Global vulnerability Higher Education CRITICAL 1d Global data_breach Government HIGH 1d
Vulnerabilities

CVE-2026-6133

High
CWE-119 — Weakness Type
Published: Apr 12, 2026  ·  Modified: Apr 19, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A vulnerability was identified in Tenda F451 1.0.0.7_cn_svn7958. This affects the function fromSafeUrlFilter of the file /goform/SafeUrlFilter. Such manipulation of the argument page 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 F451 router firmware (version 1.0.0.7_cn_svn7958) affecting the SafeUrlFilter function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the 'page' parameter, with a CVSS score of 8.8. No patch is currently available, making immediate mitigation essential for affected organizations.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 23:48
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations relying on Tenda F451 routers for network perimeter security. Primary impact sectors include: Banking and Financial Services (SAMA-regulated institutions using these routers for branch connectivity), Government agencies (NCA oversight), Telecommunications providers (STC, Mobily, Zain), Healthcare facilities, and Energy sector (ARAMCO subsidiaries). The vulnerability enables complete network compromise, data exfiltration, and lateral movement into critical infrastructure. Organizations in the Kingdom using these routers for network segmentation or content filtering face elevated risk of unauthorized access and potential compliance violations under NCA ECC 2024 and SAMA CSF frameworks.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Telecommunications Healthcare and Medical Facilities Energy and Utilities Education Retail and E-commerce
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F451 devices running firmware version 1.0.0.7_cn_svn7958 across your network using asset discovery tools
2. Isolate affected routers from critical network segments if possible, or implement network segmentation
3. Disable remote management features on affected devices immediately
4. Monitor for exploitation attempts using IDS/IPS signatures

COMPENSATING CONTROLS (until patch available):
1. Implement Web Application Firewall (WAF) rules to block requests to /goform/SafeUrlFilter endpoint
2. Restrict access to router management interfaces using network ACLs (limit to authorized admin IPs only)
3. Deploy network segmentation to isolate router management traffic
4. Enable detailed logging on affected devices and forward logs to SIEM for analysis
5. Implement rate limiting on HTTP requests to the vulnerable endpoint

DETECTION RULES:
1. Monitor for HTTP POST/GET requests to /goform/SafeUrlFilter with 'page' parameter containing unusual characters or excessive length (>256 bytes)
2. Alert on any stack overflow indicators in router logs
3. Track failed authentication attempts to router management interfaces
4. Monitor for unexpected process execution or privilege escalation on router devices

PATCHING STRATEGY:
1. Contact Tenda support for firmware updates or security advisories
2. Prepare replacement devices (alternative router models) for critical deployments
3. Schedule firmware updates immediately upon availability
4. Maintain offline backups of current configurations for rapid redeployment
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda F451 التي تعمل بإصدار البرنامج الثابت 1.0.0.7_cn_svn7958 عبر شبكتك باستخدام أدوات اكتشاف الأصول
2. عزل الأجهزة المتأثرة عن أجزاء الشبكة الحرجة إن أمكن، أو تطبيق تقسيم الشبكة
3. تعطيل ميزات الإدارة البعيدة على الأجهزة المتأثرة فوراً
4. مراقبة محاولات الاستغلال باستخدام توقيعات IDS/IPS

الضوابط التعويضية (حتى توفر التصحيح):
1. تطبيق قواعد جدار حماية تطبيقات الويب (WAF) لحجب الطلبات إلى نقطة نهاية /goform/SafeUrlFilter
2. تقييد الوصول إلى واجهات إدارة الموجه باستخدام قوائم التحكم في الوصول (ACLs) للشبكة
3. نشر تقسيم الشبكة لعزل حركة مرور إدارة الموجه
4. تفعيل السجلات التفصيلية على الأجهزة المتأثرة وإعادة توجيهها إلى SIEM للتحليل
5. تطبيق تحديد معدل الطلبات على نقطة النهاية الضعيفة

قواعد الكشف:
1. مراقبة طلبات HTTP POST/GET إلى /goform/SafeUrlFilter مع معامل 'page' يحتوي على أحرف غير عادية أو طول مفرط (>256 بايت)
2. التنبيه على أي مؤشرات تجاوز المكدس في سجلات الموجه
3. تتبع محاولات المصادقة الفاشلة لواجهات إدارة الموجه
4. مراقبة تنفيذ العمليات غير المتوقعة أو تصعيد الامتيازات على أجهزة الموجه

استراتيجية التصحيح:
1. الاتصال بدعم Tenda للحصول على تحديثات البرنامج الثابت أو التنبيهات الأمنية
2. تحضير أجهزة بديلة (نماذج موجهات بديلة) للنشرات الحرجة
3. جدولة تحديثات البرنامج الثابت فوراً عند توفرها
4. الاحتفاظ بنسخ احتياطية غير متصلة بالإنترنت من التكوينات الحالية لإعادة النشر السريعة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information Security Policies and Procedures ECC 2024 A.6.1.1 - Access Control and Authentication ECC 2024 A.8.1.1 - Cryptography and Data Protection ECC 2024 A.12.2.1 - Change Management ECC 2024 A.12.6.1 - Management of Technical Vulnerabilities
🔵 SAMA CSF
SAMA CSF ID.GV-1 - Organizational Context and Governance SAMA CSF PR.AC-1 - Access Control and Authentication SAMA CSF PR.PT-1 - Protection Processes and Procedures SAMA CSF DE.CM-1 - Detection and Analysis SAMA CSF RS.MI-1 - Incident Response and Recovery
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for Information Security ISO 27001:2022 A.6.1 - Organization of Information Security ISO 27001:2022 A.8.1 - Asset Management ISO 27001:2022 A.12.6 - Management of Technical Vulnerabilities ISO 27001:2022 A.14.2 - Information Security Requirements in Third-party Relationships
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security Patches and Updates PCI DSS 11.2 - Vulnerability Scanning PCI DSS 12.2 - Configuration Standards
📊 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 2026-04-12
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
8.9
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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