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Vulnerabilities

CVE-2026-2906

High ⚡ Exploit Available
A security flaw has been discovered in Tenda HG9 300001138. Affected is an unknown function of the file /boaform/formSamba of the component Samba Configuration Endpoint. The manipulation of the argume
CWE-119 — Weakness Type
Published: Feb 22, 2026  ·  Modified: Feb 28, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A security flaw has been discovered in Tenda HG9 300001138. Affected is an unknown function of the file /boaform/formSamba of the component Samba Configuration Endpoint. The manipulation of the argument sambaCap results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.

🤖 AI Executive Summary

A critical stack-based buffer overflow vulnerability exists in Tenda HG9 router firmware (version 300001138) affecting the Samba configuration endpoint. The flaw allows remote attackers to execute arbitrary code by manipulating the sambaCap parameter, with public exploits already available. This poses immediate risk to organizations using Tenda HG9 devices for network access and data protection.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 01:04
🇸🇦 Saudi Arabia Impact Assessment
Saudi telecommunications providers (STC, Mobily, Zain) and ISPs utilizing Tenda HG9 routers for customer premises equipment face critical risk of network compromise. Government agencies and critical infrastructure operators (ARAMCO, SEC, healthcare facilities) using these devices for network segmentation could experience unauthorized access and data exfiltration. Banking sector organizations using Tenda devices in branch networks or remote office deployments are at risk of lateral movement attacks. The vulnerability enables complete device takeover, potentially compromising internal network access and sensitive data transmission.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain) Internet Service Providers Banking and Financial Services Government and Public Administration Energy Sector (ARAMCO) Healthcare Critical Infrastructure
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda HG9 devices (firmware 300001138) in your network using asset management tools
2. Isolate affected devices from critical network segments if patching cannot be completed immediately
3. Implement network-level access controls restricting access to the /boaform/formSamba endpoint
4. Monitor for suspicious Samba configuration requests in firewall and IDS logs

PATCHING:
1. Download the latest firmware patch from Tenda's official support portal
2. Apply firmware updates during maintenance windows with documented rollback procedures
3. Verify patch installation by checking firmware version post-update
4. Test network connectivity and Samba functionality after patching

COMPENSATING CONTROLS (if immediate patching unavailable):
1. Disable remote management access to the device if not required
2. Implement strict firewall rules limiting access to the device's web interface (port 80/443) to authorized IPs only
3. Deploy WAF rules to block requests containing 'sambaCap' parameter manipulation
4. Segment Tenda devices on isolated VLANs with restricted inter-VLAN routing

DETECTION:
1. Monitor for HTTP POST requests to /boaform/formSamba with oversized sambaCap parameters
2. Alert on firmware version mismatches or unexpected device reboots
3. Track failed authentication attempts to device management interfaces
4. Implement IDS signatures for stack overflow exploitation patterns
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda HG9 (الإصدار 300001138) في شبكتك باستخدام أدوات إدارة الأصول
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة في الشبكة إذا لم يكن يمكن إكمال التصحيح فوراً
3. تطبيق عناصر تحكم الوصول على مستوى الشبكة لتقييد الوصول إلى نقطة النهاية /boaform/formSamba
4. مراقبة طلبات تكوين Samba المريبة في سجلات جدار الحماية و IDS

التصحيح:
1. تحميل أحدث تصحيح البرنامج الثابت من بوابة دعم Tenda الرسمية
2. تطبيق تحديثات البرنامج الثابت خلال نوافذ الصيانة مع إجراءات التراجع الموثقة
3. التحقق من تثبيت التصحيح بفحص إصدار البرنامج الثابت بعد التحديث
4. اختبار اتصال الشبكة وعمل Samba بعد التصحيح

عناصر التحكم البديلة (إذا لم يكن التصحيح الفوري متاحاً):
1. تعطيل الوصول الإداري البعيد للجهاز إذا لم يكن مطلوباً
2. تطبيق قواعد جدار حماية صارمة لتقييد الوصول إلى واجهة الويب للجهاز (المنفذ 80/443) على عناوين IP المصرح بها فقط
3. نشر قواعد WAF لحظر الطلبات التي تحتوي على معالجة معاملات sambaCap
4. تقسيم أجهزة Tenda على شبكات VLAN معزولة مع توجيه محدود بين VLAN

الكشف:
1. مراقبة طلبات HTTP POST إلى /boaform/formSamba بمعاملات sambaCap كبيرة الحجم
2. التنبيه على عدم تطابق إصدار البرنامج الثابت أو إعادة تشغيل الجهاز غير المتوقعة
3. تتبع محاولات المصادقة الفاشلة لواجهات إدارة الجهاز
4. تطبيق توقيعات IDS لأنماط استغلال تجاوز المخزن المؤقت
📋 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.IP-12 - Security patches and updates DE.CM-1 - Detection and monitoring of anomalous activity
🟡 ISO 27001:2022
A.12.2.1 - Monitoring and logging A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development and change management
🟣 PCI DSS v4.0.1
Requirement 6.2 - Security patches for system components Requirement 11.2 - Vulnerability scanning and assessment
📦 Affected Products / CPE 1 entries
tenda:hg9_firmware:300001138
📊 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
EPSS0.08%
Exploit ✓ Yes
Patch ✓ Yes
Published 2026-02-22
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
8.9
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
exploit-available CWE-119
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