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Vulnerabilities

CVE-2026-7033

High ⚡ Exploit Available
CWE-119 — Weakness Type
Published: Apr 26, 2026  ·  Modified: May 3, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A vulnerability has been found in Tenda F456 1.0.0.5. Affected by this vulnerability is the function fromSafeClientFilter of the file /goform/SafeClientFilter. Such manipulation of the argument menufacturer/Go leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

🤖 AI Executive Summary

A critical buffer overflow vulnerability exists in Tenda F456 router firmware (version 1.0.0.5) affecting the SafeClientFilter function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the 'manufacturer/Go' parameter, with a CVSS score of 8.8. No patch is currently available, making immediate mitigation essential for Saudi organizations relying on this router model.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 27, 2026 15:01
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi telecommunications infrastructure (STC, Mobily, Zain), government agencies using Tenda routers for network perimeter defense, banking sector branch offices, and healthcare facilities. Small and medium enterprises (SMEs) across all sectors are particularly vulnerable as Tenda routers are widely deployed in Saudi Arabia for cost-effective networking. The lack of available patches creates persistent risk for critical infrastructure and financial institutions relying on these devices for network segmentation and client filtering.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain) Government and Public Administration Banking and Financial Services Healthcare Energy and Utilities Small and Medium Enterprises (SMEs) Education
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F456 devices in your network using network scanning tools (Shodan, Censys, or internal asset management systems)
2. Isolate affected devices from critical network segments if possible
3. Disable remote management access to the router's web interface (disable port 80/443 access from WAN)
4. Implement network-level access controls restricting access to /goform/SafeClientFilter endpoint

PATCHING GUIDANCE:
1. Check Tenda's official support portal regularly for firmware updates
2. If firmware update becomes available, test in isolated lab environment before production deployment
3. Document current firmware version and maintain inventory of all affected devices

COMPENSATING CONTROLS:
1. Deploy Web Application Firewall (WAF) rules to block requests containing 'manufacturer' or 'Go' parameters to /goform/SafeClientFilter
2. Implement network segmentation to isolate router management interfaces
3. Monitor router logs for suspicious /goform/SafeClientFilter requests
4. Consider replacing Tenda F456 with alternative router models from vendors with active security support
5. Implement intrusion detection signatures for buffer overflow attempts

DETECTION RULES:
1. Monitor HTTP POST requests to /goform/SafeClientFilter with oversized 'manufacturer' parameter values
2. Alert on any requests containing special characters or encoded payloads in manufacturer/Go parameters
3. Track failed authentication attempts to router management interface
4. Monitor for unexpected process execution or system calls from router processes
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda F456 في شبكتك باستخدام أدوات المسح (Shodan أو Censys أو أنظمة إدارة الأصول الداخلية)
2. عزل الأجهزة المتأثرة عن قطاعات الشبكة الحرجة إن أمكن
3. تعطيل الوصول الإداري البعيد إلى واجهة الويب للموجه (تعطيل الوصول من WAN على المنافذ 80/443)
4. تطبيق عناصر تحكم الوصول على مستوى الشبكة لتقييد الوصول إلى نقطة نهاية /goform/SafeClientFilter

إرشادات التصحيح:
1. تحقق من بوابة دعم Tenda الرسمية بانتظام للحصول على تحديثات البرامج الثابتة
2. إذا أصبح تحديث البرامج الثابتة متاحاً، اختبره في بيئة معملية معزولة قبل النشر في الإنتاج
3. وثق إصدار البرامج الثابتة الحالي والحفاظ على جرد لجميع الأجهزة المتأثرة

عناصر التحكم التعويضية:
1. نشر قواعد جدار حماية تطبيقات الويب (WAF) لحظر الطلبات التي تحتوي على معاملات 'manufacturer' أو 'Go' إلى /goform/SafeClientFilter
2. تطبيق تقسيم الشبكة لعزل واجهات إدارة الموجه
3. مراقبة سجلات الموجه للطلبات المريبة إلى /goform/SafeClientFilter
4. النظر في استبدال Tenda F456 بنماذج موجهات بديلة من البائعين الذين يتمتعون بدعم أمان نشط
5. تطبيق توقيعات كشف الاختراق لمحاولات تجاوز المخزن المؤقت

قواعد الكشف:
1. مراقبة طلبات HTTP POST إلى /goform/SafeClientFilter بقيم معامل 'manufacturer' كبيرة الحجم
2. التنبيه على أي طلبات تحتوي على أحرف خاصة أو حمولات مشفرة في معاملات manufacturer/Go
3. تتبع محاولات المصادقة الفاشلة لواجهة إدارة الموجه
4. مراقبة تنفيذ العمليات غير المتوقعة أو استدعاءات النظام من عمليات الموجه
📋 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 Identification SAMA CSF PR.IP-12 - Security Patch Management SAMA CSF DE.CM-1 - Detection and Analysis
🟡 ISO 27001:2022
ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities ISO 27001:2022 A.14.2.1 - Secure development policy ISO 27001:2022 A.12.2.1 - Monitoring and logging
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patch management PCI DSS 11.2 - Vulnerability scanning
📦 Affected Products / CPE 1 entries
tenda:f456_firmware:1.0.0.5
📊 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 ✓ Yes
Patch ✗ No
Published 2026-04-26
Source Feed nvd
🇸🇦 Saudi Risk Score
8.5
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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