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Vulnerabilities

CVE-2026-5604

High
CWE-119 — Weakness Type
Published: Apr 5, 2026  ·  Modified: Apr 12, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

A security flaw has been discovered in Tenda CH22 1.0.0.1. The impacted element is the function formCertLocalPrecreate of the file /goform/CertLocalPrecreate of the component Parameter Handler. Performing a manipulation of the argument standard results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.

🤖 AI Executive Summary

CVE-2026-5604 is a critical stack-based buffer overflow vulnerability in Tenda CH22 router firmware (version 1.0.0.1) affecting the certificate precreation function. The vulnerability allows remote attackers to execute arbitrary code by manipulating the 'standard' parameter, with public exploit code available. This poses immediate risk to organizations using Tenda networking equipment across Saudi Arabia's critical infrastructure.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 23, 2026 18:07
🇸🇦 Saudi Arabia Impact Assessment
High impact on Saudi telecommunications sector (STC, Mobily, Zain) and government agencies using Tenda networking equipment. Banking sector (SAMA-regulated institutions) at risk if Tenda CH22 routers deployed in branch networks or data centers. Energy sector (ARAMCO, SEC) vulnerable if equipment used in operational technology networks. Healthcare institutions and educational facilities using Tenda equipment for network infrastructure face potential service disruption and data breach risks. Small and medium enterprises across all sectors represent significant attack surface.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain) Banking and Financial Services Government and Public Administration Energy and Utilities (ARAMCO, SEC) Healthcare Education Small and Medium Enterprises
⚖️ Saudi Risk Score (AI)
8.9
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Tenda CH22 devices in your network using network scanning tools (nmap, Shodan queries)
2. Isolate affected devices from critical network segments if possible
3. Implement network segmentation to restrict access to the /goform/CertLocalPrecreate endpoint
4. Monitor for exploitation attempts using IDS/IPS signatures

PATCHING GUIDANCE:
1. Contact Tenda support immediately for firmware updates (no patch currently available)
2. Check Tenda security advisories regularly at security.tenda.com.cn
3. Prepare for emergency firmware deployment once available

COMPENSATING CONTROLS:
1. Implement Web Application Firewall (WAF) rules to block requests to /goform/CertLocalPrecreate
2. Restrict administrative access to router management interfaces (limit to trusted IPs only)
3. Disable remote management features if not required
4. Deploy network-based intrusion detection with buffer overflow detection signatures
5. Implement rate limiting on the vulnerable endpoint

DETECTION RULES:
1. Monitor HTTP POST requests to /goform/CertLocalPrecreate with oversized 'standard' parameter values
2. Alert on any stack-based buffer overflow attempts in router logs
3. Track failed certificate operations and authentication anomalies
4. Monitor for unexpected process execution or privilege escalation on affected devices
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Tenda CH22 في شبكتك باستخدام أدوات المسح (nmap، استعلامات Shodan)
2. عزل الأجهزة المتأثرة عن قطاعات الشبكة الحرجة إن أمكن
3. تنفيذ تقسيم الشبكة لتقييد الوصول إلى نقطة النهاية /goform/CertLocalPrecreate
4. مراقبة محاولات الاستغلال باستخدام توقيعات IDS/IPS

إرشادات التصحيح:
1. الاتصال بدعم Tenda فوراً للحصول على تحديثات البرنامج الثابت (لا يوجد تصحيح حالياً)
2. التحقق من استشارات أمان Tenda بانتظام على security.tenda.com.cn
3. الاستعداد للنشر الطارئ للبرنامج الثابت عند توفره

الضوابط البديلة:
1. تنفيذ قواعد جدار حماية تطبيقات الويب (WAF) لحظر الطلبات إلى /goform/CertLocalPrecreate
2. تقييد الوصول الإداري إلى واجهات إدارة الموجه (تحديد عناوين IP موثوقة فقط)
3. تعطيل ميزات الإدارة البعيدة إذا لم تكن مطلوبة
4. نشر كشف الاختراق المستند إلى الشبكة مع توقيعات كشف تجاوز المخزن المؤقت
5. تنفيذ تحديد معدل على نقطة النهاية المعرضة للخطر

قواعد الكشف:
1. مراقبة طلبات HTTP POST إلى /goform/CertLocalPrecreate بقيم معامل 'standard' كبيرة الحجم
2. التنبيه على أي محاولات تجاوز المخزن المؤقت المستند إلى المكدس في سجلات الموجه
3. تتبع عمليات الشهادات الفاشلة والشذوذ في المصادقة
4. مراقبة تنفيذ العمليات غير المتوقعة أو تصعيد الامتيازات على الأجهزة المتأثرة
📋 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 activities
🔵 SAMA CSF
SAMA CSF ID.RA-1 - Asset Management and Vulnerability Assessment SAMA CSF PR.IP-12 - Security patch management SAMA CSF DE.CM-1 - Detection and monitoring of anomalous activities
🟡 ISO 27001:2022
ISO 27001:2022 A.12.2.1 - Monitoring and logging ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities ISO 27001:2022 A.14.2.1 - Secure development and change management
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security patch management PCI DSS 11.2 - Vulnerability scanning and assessment
📊 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 No
Patch ✗ No
Published 2026-04-05
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
8.9
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-119
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