📄 Description (English)
Trend Micro Multiple Products Improper Input Validation Vulnerability — Trend Micro Apex One, Apex One as a Service, and Worry-Free Business Security contain an improper input validation vulnerability that allows for privilege escalation.
🤖 AI Executive Summary
CVE-2021-36742 is a critical privilege escalation vulnerability (CVSS 9.0) affecting Trend Micro Apex One, Apex One as a Service, and Worry-Free Business Security due to improper input validation. An authenticated attacker can exploit this flaw to escalate privileges and gain system-level access. With public exploits available, this poses an immediate threat to organizations relying on Trend Micro endpoint protection across Saudi Arabia.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 21, 2026 00:32
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses severe risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), healthcare organizations (MOH), energy sector (ARAMCO, SEC), and telecommunications (STC, Mobily). Trend Micro Apex One is widely deployed across Saudi enterprises as primary endpoint protection. Privilege escalation could enable lateral movement, data exfiltration, and ransomware deployment. Government critical infrastructure and financial institutions face highest risk due to regulatory compliance requirements and operational continuity dependencies.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Telecommunications
Critical Infrastructure
Education
Retail and E-commerce
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running Trend Micro Apex One, Apex One as a Service, or Worry-Free Business Security across your environment
2. Prioritize patching for systems with administrative access or handling sensitive data
3. Implement network segmentation to limit lateral movement from compromised endpoints
4. Enable enhanced logging and monitoring for privilege escalation attempts
PATCHING GUIDANCE:
1. Apply Trend Micro security patches immediately (versions: Apex One 14.0 Update 1 or later, Apex One as a Service latest version)
2. Test patches in non-production environment first
3. Deploy patches via Trend Micro Control Manager with staged rollout
4. Verify patch installation and system stability post-deployment
COMPENSATING CONTROLS (if patching delayed):
1. Restrict local administrator account usage and implement privileged access management (PAM)
2. Disable unnecessary services and features in Trend Micro products
3. Apply application whitelisting to prevent unauthorized privilege escalation tools
4. Monitor and restrict access to Trend Micro service processes
DETECTION RULES:
1. Monitor for suspicious process creation with elevated privileges from Trend Micro services
2. Alert on unauthorized modifications to Trend Micro configuration files
3. Track failed and successful privilege escalation attempts in Windows Event Logs (Event ID 4672, 4673)
4. Monitor for unusual parent-child process relationships involving Trend Micro components
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تقوم بتشغيل Trend Micro Apex One أو Apex One as a Service أو Worry-Free Business Security في بيئتك
2. إعطاء الأولوية لتصحيح الأنظمة التي تحتوي على وصول إداري أو تتعامل مع بيانات حساسة
3. تنفيذ تقسيم الشبكة لتحديد الحركة الجانبية من نقاط النهاية المخترقة
4. تفعيل السجلات المحسنة والمراقبة لمحاولات تصعيد الامتيازات
إرشادات التصحيح:
1. تطبيق تحديثات أمان Trend Micro على الفور (الإصدارات: Apex One 14.0 Update 1 أو أحدث، Apex One as a Service أحدث إصدار)
2. اختبار التصحيحات في بيئة غير الإنتاج أولاً
3. نشر التصحيحات عبر Trend Micro Control Manager مع التطبيق المرحلي
4. التحقق من تثبيت التصحيح واستقرار النظام بعد النشر
الضوابط البديلة (إذا تأخر التصحيح):
1. تقييد استخدام حساب المسؤول المحلي وتنفيذ إدارة الوصول المميز (PAM)
2. تعطيل الخدمات والميزات غير الضرورية في منتجات Trend Micro
3. تطبيق القائمة البيضاء للتطبيقات لمنع أدوات تصعيد الامتيازات غير المصرح بها
4. مراقبة وتقييد الوصول إلى عمليات خدمة Trend Micro
قواعد الكشف:
1. مراقبة إنشاء العمليات المريبة بامتيازات مرتفعة من خدمات Trend Micro
2. التنبيه على التعديلات غير المصرح بها على ملفات تكوين Trend Micro
3. تتبع محاولات تصعيد الامتيازات الفاشلة والناجحة في سجلات أحداث Windows (معرف الحدث 4672، 4673)
4. مراقبة العلاقات غير العادية بين العمليات الأب والفرع التي تتضمن مكونات Trend Micro
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policies
ECC 2024 A.5.2.1 - User Registration and Access Rights Management
ECC 2024 A.5.3.1 - Management of Privileged Access Rights
ECC 2024 A.8.2.1 - User Endpoint Devices
ECC 2024 A.8.3.1 - Management of Removable Media
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Hardware and Software Assets
SAMA CSF PR.AC-1 - Access Control Policy
SAMA CSF PR.AC-4 - Access Rights Management
SAMA CSF DE.CM-1 - Network Monitoring
SAMA CSF DE.CM-3 - Unauthorized Software Detection
🟡 ISO 27001:2022
ISO 27001:2022 A.5.2 - Information Security Policies
ISO 27001:2022 A.5.15 - Access Control
ISO 27001:2022 A.5.16 - Identification and Authentication
ISO 27001:2022 A.8.1 - User Endpoint Devices
ISO 27001:2022 A.8.2 - Privileged Access Rights
🟣 PCI DSS v4.0
PCI DSS 2.1 - Security Configuration Standards
PCI DSS 6.2 - Security Patches and Updates
PCI DSS 7.1 - Limit Access to System Components
PCI DSS 8.1 - User Identification and Authentication
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Trend Micro:Apex One, Apex One as a Service, and Worry-Free Business Security