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Vulnerabilities

CVE-2026-4553

High
A vulnerability was identified in Tenda F453 1.0.0.3. Impacted is the function fromNatlimit of the file /goform/Natlimit of the component Parameters Handler. The manipulation of the argument page lead
CWE-119 — Weakness Type
Published: Mar 22, 2026  ·  Modified: Mar 29, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A vulnerability was identified in Tenda F453 1.0.0.3. Impacted is the function fromNatlimit of the file /goform/Natlimit of the component Parameters Handler. The manipulation of the argument page leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

🤖 AI Executive Summary

A critical stack-based buffer overflow vulnerability exists in Tenda F453 router firmware (version 1.0.0.3) affecting the NAT limit parameter handler. The vulnerability allows remote attackers to execute arbitrary code by manipulating the 'page' argument, potentially compromising network infrastructure. With a CVSS score of 8.8 and public exploit availability, this poses an immediate threat to organizations using this router model.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 11:51
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations, particularly: (1) Telecom sector (STC, Mobily, Zain) using Tenda routers in network infrastructure; (2) Banking and financial institutions relying on these routers for branch connectivity; (3) Government agencies and critical infrastructure operators; (4) Healthcare facilities using Tenda equipment for network segmentation; (5) Small and medium enterprises (SMEs) across all sectors that commonly deploy budget-friendly Tenda routers. The lack of available patches creates persistent exposure across the Saudi digital ecosystem.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain) Banking and Financial Services Government and Public Administration Healthcare Energy and Utilities Small and Medium Enterprises (SMEs) Retail and E-commerce
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F453 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/Natlimit endpoint
4. Monitor for exploitation attempts targeting port 80/443 with 'page' parameter manipulation

COMPENSATING CONTROLS:
1. Deploy Web Application Firewall (WAF) rules blocking requests to /goform/Natlimit with suspicious 'page' parameters
2. Implement rate limiting on the affected endpoint
3. Restrict administrative access to router management interfaces via IP whitelisting
4. Disable remote management features if not required
5. Segment network to limit lateral movement if compromise occurs

DETECTION RULES:
1. Monitor HTTP requests containing 'Natlimit' with abnormally long 'page' parameter values (>256 bytes)
2. Alert on any POST requests to /goform/Natlimit endpoint
3. Monitor for unexpected process execution from router processes
4. Track failed authentication attempts to router management interfaces

PATCHING:
1. Contact Tenda support for firmware updates (currently unavailable)
2. Consider replacement with alternative router models from vendors with active security support
3. Maintain inventory of affected devices for future patch deployment
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda F453 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan)
2. عزل الأجهزة المتأثرة عن قطاعات الشبكة الحرجة إن أمكن
3. تطبيق عناصر تحكم الوصول على مستوى الشبكة لتقييد الوصول إلى نقطة نهاية /goform/Natlimit
4. مراقبة محاولات الاستغلال التي تستهدف المنافذ 80/443 مع التلاعب بمعامل 'page'

عناصر التحكم التعويضية:
1. نشر قواعد جدار حماية تطبيقات الويب (WAF) لحجب الطلبات إلى /goform/Natlimit بمعاملات 'page' مريبة
2. تطبيق تحديد معدل على نقطة النهاية المتأثرة
3. تقييد الوصول الإداري إلى واجهات إدارة جهاز التوجيه عبر قائمة بيضاء للعناوين
4. تعطيل ميزات الإدارة البعيدة إذا لم تكن مطلوبة
5. تقسيم الشبكة لتحديد الحركة الجانبية في حالة الاختراق

قواعد الكشف:
1. مراقبة طلبات HTTP التي تحتوي على 'Natlimit' مع قيم معامل 'page' طويلة بشكل غير طبيعي (>256 بايت)
2. تنبيه على أي طلبات POST إلى نقطة نهاية /goform/Natlimit
3. مراقبة تنفيذ العمليات غير المتوقعة من عمليات جهاز التوجيه
4. تتبع محاولات المصادقة الفاشلة لواجهات إدارة جهاز التوجيه

التصحيح:
1. الاتصال بدعم Tenda للحصول على تحديثات البرامج الثابتة (غير متاحة حالياً)
2. النظر في الاستبدال بنماذج جهاز توجيه بديلة من البائعين الذين يتمتعون بدعم أمان نشط
3. الحفاظ على جرد الأجهزة المتأثرة لنشر التصحيح في المستقبل
📋 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 access
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification PR.PT-2 - System and communications protection DE.CM-1 - Detection and analysis of anomalies
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy and procedures A.12.2.1 - User access management A.12.4.1 - Event logging
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches and updates Requirement 11.2 - Vulnerability scanning
📊 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
Exploit No
Patch ✗ No
Published 2026-03-22
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
8.9
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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