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Vulnerabilities

CVE-2026-7054

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 weakness has been identified in Tenda F456 1.0.0.5. This vulnerability affects the function fromPptpUserAdd of the file /goform/PPTPDClient of the component httpd. Executing a manipulation of the argument opttype/usernamewith can lead to buffer overflow. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks.

🤖 AI Executive Summary

A critical buffer overflow vulnerability (CVE-2026-7054) exists in Tenda F456 router firmware version 1.0.0.5 affecting the PPTP client configuration function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the 'opttype' or 'username' parameters, 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 29, 2026 17:49
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations using Tenda F456 routers for remote access infrastructure. Primary impact sectors include: (1) Banking and Financial Services (SAMA-regulated entities) using PPTP for secure branch connectivity; (2) Government agencies (NCA oversight) relying on these routers for network perimeter security; (3) Telecommunications providers (STC, Mobily) using Tenda equipment in customer networks; (4) Healthcare facilities requiring secure remote access for telemedicine; (5) Energy sector (ARAMCO, utilities) using PPTP for industrial control system connectivity. Remote code execution capability enables complete device compromise, lateral network movement, and potential access to sensitive corporate networks.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Telecommunications Healthcare Energy and Utilities Education Retail
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda F456 devices running firmware 1.0.0.5 in your network using network scanning tools (nmap, Shodan queries)
2. Disable PPTP services immediately if not critical to operations
3. Isolate affected routers from untrusted networks using network segmentation
4. Monitor for exploitation attempts using IDS/IPS signatures

PATCHING GUIDANCE:
1. Check Tenda support portal regularly for firmware updates (currently no patch available)
2. Contact Tenda support directly to request security patches
3. Prepare upgrade procedures for immediate deployment once patches are released

COMPENSATING CONTROLS (until patch available):
1. Implement network access controls (NAC) to restrict access to router management interfaces
2. Deploy Web Application Firewall (WAF) rules to filter malicious PPTP configuration requests
3. Restrict access to /goform/PPTPDClient endpoint using firewall rules (block external access)
4. Implement rate limiting on HTTP requests to httpd service
5. Use VPN tunneling to protect management traffic to affected devices
6. Enable router authentication and change default credentials
7. Disable remote management access if possible

DETECTION RULES:
1. Monitor for HTTP POST requests to /goform/PPTPDClient with suspicious 'opttype' or 'username' parameters containing special characters or excessive length (>256 bytes)
2. Alert on any firmware version 1.0.0.5 identification in network scans
3. Monitor router logs for failed PPTP authentication attempts
4. Track unusual process execution on router devices
5. Implement SNORT/Suricata rule: alert http any any -> any any (msg:"Tenda F456 PPTP Buffer Overflow Attempt"; content:"/goform/PPTPDClient"; http_uri; content:"opttype"; http_client_body; sid:1000001;)
6. Monitor for unexpected router reboots or service restarts
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda F456 التي تعمل بالإصدار 1.0.0.5 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan)
2. تعطيل خدمات PPTP فوراً إذا لم تكن حرجة للعمليات
3. عزل أجهزة التوجيه المتأثرة عن الشبكات غير الموثوقة باستخدام تقسيم الشبكة
4. مراقبة محاولات الاستغلال باستخدام توقيعات IDS/IPS

إرشادات التصحيح:
1. تحقق من بوابة دعم Tenda بانتظام للحصول على تحديثات البرامج الثابتة (لا يتوفر تصحيح حالياً)
2. اتصل بدعم Tenda مباشرة لطلب تصحيحات الأمان
3. جهز إجراءات الترقية للنشر الفوري بمجرد إصدار التصحيحات

الضوابط البديلة (حتى توفر التصحيح):
1. تطبيق ضوابط الوصول إلى الشبكة (NAC) لتقييد الوصول إلى واجهات إدارة جهاز التوجيه
2. نشر قواعد جدار حماية تطبيقات الويب (WAF) لتصفية طلبات تكوين PPTP الضارة
3. تقييد الوصول إلى نقطة نهاية /goform/PPTPDClient باستخدام قواعد جدار الحماية (حظر الوصول الخارجي)
4. تطبيق تحديد معدل على طلبات HTTP لخدمة httpd
5. استخدام نفق VPN لحماية حركة المرور الإدارية للأجهزة المتأثرة
6. تفعيل مصادقة جهاز التوجيه وتغيير بيانات الاعتماد الافتراضية
7. تعطيل الوصول الإداري البعيد إن أمكن

قواعد الكشف:
1. مراقبة طلبات HTTP POST إلى /goform/PPTPDClient بمعاملات 'opttype' أو 'username' مريبة تحتوي على أحرف خاصة أو طول مفرط (>256 بايت)
2. تنبيه عند تحديد أي إصدار برامج ثابتة 1.0.0.5 في مسح الشبكة
3. مراقبة سجلات جهاز التوجيه لمحاولات مصادقة PPTP الفاشلة
4. تتبع تنفيذ العمليات غير المعتادة على أجهزة التوجيه
5. تطبيق قاعدة SNORT/Suricata: alert http any any -> any any (msg:"Tenda F456 PPTP Buffer Overflow Attempt"; content:"/goform/PPTPDClient"; http_uri; content:"opttype"; http_client_body; sid:1000001;)
6. مراقبة إعادة تشغيل جهاز التوجيه غير المتوقعة أو إعادة تشغيل الخدمة
📋 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 ECC 2024 A.13.1.3 - Segregation of networks
🔵 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 - Network monitoring and anomaly detection SAMA CSF RS.MI-2 - Incident containment and eradication
🟡 ISO 27001:2022
ISO 27001:2022 A.12.3.1 - Configuration management ISO 27001:2022 A.14.2.1 - Secure development and change management ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities ISO 27001:2022 A.8.1.1 - Inventory of assets
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patch management PCI DSS 11.2 - Vulnerability scanning PCI DSS 1.1 - Firewall configuration standards
📦 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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