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Vulnerabilities

CVE-2026-7256

High
CWE-78 — Weakness Type
Published: May 12, 2026  ·  Modified: May 19, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

** UNSUPPORTED WHEN ASSIGNED ** A command injection vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to execute operating system (OS) commands on a vulnerable device by sending a crafted HTTP request.

🤖 AI Executive Summary

A critical command injection vulnerability (CVE-2026-7256) exists in Zyxel WRE6505 v2 wireless range extenders running firmware V1.00(ABDV.3)C0, allowing adjacent LAN attackers to execute arbitrary OS commands via crafted HTTP requests. With a CVSS score of 8.8 and no available patch, this poses immediate risk to enterprise and residential networks across Saudi Arabia. The vulnerability is particularly concerning as it requires only network adjacency, making it exploitable in shared network environments common in Saudi organizations.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 14, 2026 23:30
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations utilizing Zyxel WRE6505 v2 devices, particularly in: (1) Banking and Financial Sector (SAMA-regulated) — range extenders in branch networks could be compromised to pivot into core banking systems; (2) Government Agencies (NCA oversight) — widespread use in government offices and ministries for network expansion; (3) Telecommunications (STC, Mobily, Zain) — used in enterprise and residential deployments; (4) Healthcare Sector (MOH) — network infrastructure in hospitals and clinics; (5) Energy Sector (ARAMCO, SEC) — industrial network segments. The lack of patch availability and ease of exploitation (adjacent network access only) makes this a critical infrastructure concern.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Telecommunications Healthcare Energy and Utilities Education Retail and E-commerce
⚖️ Saudi Risk Score (AI)
8.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Zyxel WRE6505 v2 devices in your network using network scanning tools (Nmap, Shodan queries for Zyxel devices)
2. Isolate affected devices from critical network segments if possible
3. Restrict LAN access to these devices using network segmentation and ACLs
4. Monitor for suspicious HTTP requests to these devices (port 80/443)

PATCHING GUIDANCE:
1. Check Zyxel support portal regularly for firmware updates beyond V1.00(ABDV.3)C0
2. If no patch becomes available, plan device replacement with alternative vendors
3. Contact Zyxel support directly for security advisories

COMPENSATING CONTROLS (until patch available):
1. Implement network segmentation — place WRE6505 v2 devices on isolated VLAN with restricted access
2. Deploy Web Application Firewall (WAF) rules to block suspicious HTTP patterns to device management interfaces
3. Disable remote management features if not required
4. Implement strict firewall rules limiting access to device management ports (typically 80, 443, 8080)
5. Use network intrusion detection (IDS) to monitor for exploitation attempts

DETECTION RULES:
1. Monitor for HTTP POST/GET requests to Zyxel WRE6505 v2 devices with suspicious parameters (command injection patterns: |, ;, &, $(), backticks)
2. Alert on any OS command execution from WRE6505 v2 processes
3. Log and monitor CGI program access patterns
4. Implement SIEM rules for: POST requests with encoded payloads, multiple failed authentication attempts followed by successful access, unusual process spawning from web server processes
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Zyxel WRE6505 v2 في شبكتك باستخدام أدوات المسح (Nmap، استعلامات Shodan)
2. عزل الأجهزة المتأثرة عن القطاعات الحرجة إن أمكن
3. تقييد الوصول إلى هذه الأجهزة باستخدام تقسيم الشبكة وقوائم التحكم في الوصول
4. مراقبة الطلبات المريبة إلى هذه الأجهزة

إرشادات التصحيح:
1. التحقق من بوابة دعم Zyxel بانتظام للحصول على تحديثات البرنامج الثابت
2. إذا لم يتوفر تصحيح، خطط لاستبدال الجهاز بموردين بدلاء
3. التواصل مع دعم Zyxel مباشرة للحصول على التنبيهات الأمنية

الضوابط البديلة:
1. تنفيذ تقسيم الشبكة — ضع أجهزة WRE6505 v2 على VLAN معزول
2. نشر قواعد جدار حماية تطبيقات الويب لحظر الأنماط المريبة
3. تعطيل ميزات الإدارة البعيدة إن لم تكن مطلوبة
4. تنفيذ قواعد جدار حماية صارمة
5. استخدام كشف التطفل على الشبكة

قواعد الكشف:
1. مراقبة طلبات HTTP المريبة إلى الأجهزة
2. التنبيه على تنفيذ أوامر نظام التشغيل
3. تسجيل ومراقبة أنماط الوصول إلى برنامج CGI
4. تنفيذ قواعم SIEM للكشف عن محاولات الاستغلال
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.8.1 - Asset Management and Inventory Control ECC 2024 A.8.2 - Information Security Perimeter ECC 2024 A.12.6 - Management of Technical Vulnerabilities ECC 2024 A.14.2 - System Development and Change Management
🔵 SAMA CSF
SAMA CSF ID.AM-1 - Physical Devices and Software Assets SAMA CSF PR.AC-1 - Access Control Policy SAMA CSF PR.PT-1 - Security Planning Processes SAMA CSF DE.CM-1 - Network Monitoring
🟡 ISO 27001:2022
ISO 27001:2022 A.5.23 - Information Security for Supplier Relationships ISO 27001:2022 A.8.1 - Asset Management ISO 27001:2022 A.8.2 - Information Security Perimeter ISO 27001:2022 A.12.6 - Management of Technical Vulnerabilities
🟣 PCI DSS v4.0.1
PCI DSS 6.2 - Security Patches and Updates PCI DSS 11.2 - Vulnerability Scanning
📦 Affected Products / CPE 1 entries
zyxel:wre6505_firmware:v1.00\(abdv.3\)c0
📊 CVSS Score
8.8
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorA — Adjacent
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.8
CWECWE-78
EPSS1.21%
Exploit No
Patch ✗ No
Published 2026-05-12
Source Feed nvd
🇸🇦 Saudi Risk Score
8.5
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-78
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