📄 Description (English)
Microsoft Windows NTFS Privilege Escalation Vulnerability — Microsoft Windows New Technology File System (NTFS) contains an unspecified vulnerability that allows attackers to escalate privileges via a specially crafted application.
🤖 AI Executive Summary
CVE-2021-31956 is a critical privilege escalation vulnerability in Microsoft Windows NTFS with a CVSS score of 9.0. An attacker can exploit this flaw through a specially crafted application to escalate privileges from a low-privileged user to SYSTEM level. With public exploits available, this vulnerability poses an immediate and severe threat to all Windows-based systems across Saudi organizations.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 20, 2026 19:37
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability affects all Saudi organizations using Windows systems, with critical impact on: Banking sector (SAMA-regulated institutions, payment processing systems), Government agencies (NCA, ministries), Healthcare providers (SEHA, private hospitals), Energy sector (ARAMCO, utilities), Telecommunications (STC, Mobily, Zain), and Critical Infrastructure operators. The privilege escalation capability enables attackers to gain complete system control, potentially leading to data theft, ransomware deployment, and operational disruption across these critical sectors.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare and Medical Services
Energy and Utilities
Telecommunications
Critical Infrastructure
Defense and Security
Education
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Prioritize patching all Windows systems immediately — this is a critical vulnerability with active exploits
2. Apply Microsoft security updates KB5003637 (Windows 10/11) or equivalent patches for your Windows version
3. Implement application whitelisting to prevent execution of suspicious applications
4. Restrict user account privileges — ensure users operate with minimal necessary permissions
5. Monitor for suspicious process creation and privilege escalation attempts
DETECTION RULES:
- Monitor for unusual NTFS operations and file system access patterns
- Alert on processes attempting to modify system files or registry with elevated privileges
- Track creation of suspicious scheduled tasks or services
- Monitor for unexpected SYSTEM-level process spawning from user applications
COMPENSATING CONTROLS (if patching delayed):
- Disable NTFS compression features if not required
- Implement strict application control policies
- Increase logging and monitoring of file system operations
- Isolate critical systems from untrusted networks
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. أولويات تصحيح جميع أنظمة Windows فوراً — هذه ثغرة حرجة مع استغلالات نشطة
2. تطبيق تحديثات أمان Microsoft KB5003637 (Windows 10/11) أو التصحيحات المكافئة لإصدار Windows الخاص بك
3. تنفيذ قائمة بيضاء للتطبيقات لمنع تنفيذ التطبيقات المريبة
4. تقييد امتيازات حسابات المستخدمين — تأكد من أن المستخدمين يعملون بأقل صلاحيات ضرورية
5. مراقبة محاولات تصعيد الامتيازات والعمليات المريبة
قواعد الكشف:
- مراقبة عمليات NTFS غير العادية وأنماط الوصول إلى نظام الملفات
- تنبيهات على العمليات التي تحاول تعديل ملفات النظام أو السجل برفع الامتيازات
- تتبع إنشاء المهام المجدولة أو الخدمات المريبة
- مراقبة توليد عمليات SYSTEM غير المتوقعة من تطبيقات المستخدم
الضوابط البديلة (إذا تأخر التصحيح):
- تعطيل ميزات ضغط NTFS إذا لم تكن مطلوبة
- تنفيذ سياسات تحكم صارمة في التطبيقات
- زيادة تسجيل ومراقبة عمليات نظام الملفات
- عزل الأنظمة الحرجة عن الشبكات غير الموثوقة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 — Access Control Policies
ECC 2024 A.5.2.1 — User Registration and De-registration
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 — Information Backup
🔵 SAMA CSF
SAMA CSF ID.AM-2 — Software Inventory
SAMA CSF PR.AC-1 — Access Control Policy
SAMA CSF PR.AC-4 — Access Rights Management
SAMA CSF DE.CM-1 — System Monitoring
SAMA CSF RS.MI-1 — Incident Response Procedures
🟡 ISO 27001:2022
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
ISO 27001:2022 A.8.3 — Information Backup
🟣 PCI DSS v4.0
PCI DSS 2.1 — Configuration Standards
PCI DSS 6.2 — Security Patches
PCI DSS 7.1 — Limit Access to System Components
PCI DSS 10.2 — Implement Automated Audit Trails
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Windows