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Vulnerabilities

CVE-2026-7055

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 security vulnerability has been detected in Tenda F456 1.0.0.5. This issue affects the function fromVirtualSer of the file /goform/VirtualSer of the component httpd. The manipulation of the argument menufacturer/Go leads to buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used.

🤖 AI Executive Summary

A critical remote buffer overflow vulnerability exists in Tenda F456 router firmware version 1.0.0.5 affecting the httpd component's VirtualSer function. The vulnerability allows unauthenticated remote attackers to execute arbitrary code by manipulating the menufacturer/Go parameter. With a CVSS score of 8.8 and public exploit disclosure, this poses an immediate threat to organizations using this router model for network infrastructure.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 29, 2026 17:50
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations, particularly: (1) Banking sector — if Tenda F456 routers are used in branch networks or as edge devices for connectivity; (2) Government agencies and NCA infrastructure — if deployed in network perimeters; (3) Telecommunications providers (STC, Mobily, Zain) — if used in customer premises equipment or network infrastructure; (4) Healthcare facilities — if used for medical device network segmentation; (5) Energy sector (ARAMCO, SEC) — if deployed 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 Retail Education
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F456 routers in your network using asset management tools and network scanning
2. Isolate affected devices from critical networks or place behind additional firewall rules
3. Disable remote management features (disable WAN access to httpd service)
4. Implement network segmentation to restrict access to the /goform/VirtualSer endpoint
5. Monitor for exploitation attempts using IDS/IPS signatures

PATCHING GUIDANCE:
1. Contact Tenda support immediately for firmware updates beyond 1.0.0.5
2. If no patch is available, consider replacing the device with alternative router models from vendors with active security support
3. Implement a firmware update schedule once patches are released

COMPENSATING CONTROLS:
1. Deploy Web Application Firewall (WAF) rules to block requests to /goform/VirtualSer containing suspicious menufacturer/Go parameters
2. Implement strict input validation and rate limiting on httpd service
3. Use network-based IPS to detect buffer overflow attack patterns
4. Restrict administrative access to router management interfaces to specific IP ranges
5. Enable detailed logging of all httpd requests for forensic analysis

DETECTION RULES:
1. Monitor for POST/GET requests to /goform/VirtualSer with menufacturer/Go parameters exceeding normal length (>256 bytes)
2. Alert on any httpd process crashes or unexpected restarts
3. Track failed authentication attempts followed by exploitation attempts
4. Monitor for outbound connections from router to suspicious external IPs
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة التوجيه Tenda F456 في شبكتك باستخدام أدوات إدارة الأصول والمسح الشبكي
2. عزل الأجهزة المتأثرة عن الشبكات الحرجة أو وضعها خلف قواعد جدار حماية إضافية
3. تعطيل ميزات الإدارة البعيدة (تعطيل وصول WAN إلى خدمة httpd)
4. تنفيذ تقسيم الشبكة لتقييد الوصول إلى نقطة النهاية /goform/VirtualSer
5. مراقبة محاولات الاستغلال باستخدام توقيعات IDS/IPS

إرشادات التصحيح:
1. الاتصال بدعم Tenda فوراً للحصول على تحديثات البرامج الثابتة بعد الإصدار 1.0.0.5
2. إذا لم يكن هناك تصحيح متاح، فكر في استبدال الجهاز بنماذج موجهات بديلة من بائعين لديهم دعم أمان نشط
3. تنفيذ جدول تحديث البرامج الثابتة بمجرد إصدار التصحيحات

الضوابط البديلة:
1. نشر قواعد جدار حماية تطبيقات الويب (WAF) لحجب الطلبات إلى /goform/VirtualSer التي تحتوي على معاملات menufacturer/Go مريبة
2. تنفيذ التحقق الصارم من المدخلات وتحديد معدل الطلبات على خدمة httpd
3. استخدام IPS المستند إلى الشبكة للكشف عن أنماط هجمات تجاوز المخزن المؤقت
4. تقييد الوصول الإداري إلى واجهات إدارة الموجه إلى نطاقات IP محددة
5. تفعيل تسجيل مفصل لجميع طلبات httpd للتحليل الجنائي

قواعد الكشف:
1. مراقبة طلبات POST/GET إلى /goform/VirtualSer مع معاملات menufacturer/Go التي تتجاوز الطول الطبيعي (>256 بايت)
2. التنبيه على أي أعطال في عملية httpd أو إعادة تشغيل غير متوقعة
3. تتبع محاولات المصادقة الفاشلة متبوعة بمحاولات الاستغلال
4. مراقبة الاتصالات الصادرة من الموجه إلى عناوين IP خارجية مريبة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 — Network security controls and perimeter defense ECC 2024 A.5.2.1 — Access control and authentication mechanisms ECC 2024 A.6.2.1 — Vulnerability management and patch management ECC 2024 A.8.2.3 — Monitoring and logging of security events
🔵 SAMA CSF
SAMA CSF ID.RA-1 — Asset management and inventory SAMA CSF PR.AC-1 — Access control policies SAMA CSF PR.IP-12 — Software development and patch management SAMA CSF DE.CM-1 — Detection and monitoring capabilities
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 — Policies for information security ISO 27001:2022 A.8.1 — Asset management ISO 27001:2022 A.12.6 — Change management ISO 27001:2022 A.14.2 — Software development security
🟣 PCI DSS v4.0.1
PCI DSS 1.1 — Firewall configuration standards PCI DSS 6.2 — Security patches and updates PCI DSS 11.2 — Vulnerability scanning and assessment
📦 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
8.9
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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