📄 Description (English)
Microsoft Win32k Privilege Escalation Vulnerability — Microsoft Windows Win32k contains an unspecified vulnerability that allows for privilege escalation.
🤖 AI Executive Summary
CVE-2021-28310 is a critical privilege escalation vulnerability in Microsoft Windows Win32k component with a CVSS score of 9.0. An attacker can exploit this vulnerability to escalate privileges from a low-privileged user to SYSTEM level, potentially compromising entire Windows systems. With public exploits available, this poses an immediate threat to Saudi organizations running unpatched Windows systems across all sectors.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 20, 2026 11:03
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses critical risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), healthcare providers, energy sector (ARAMCO and subsidiaries), and telecommunications companies (STC, Mobily). Win32k is a core Windows component affecting all Windows systems. Government entities and critical infrastructure operators are at highest risk due to potential lateral movement and complete system compromise. Financial institutions face risks of unauthorized access to sensitive banking systems and customer data.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare and Medical Services
Energy and Utilities
Telecommunications
Critical Infrastructure
Defense and Security
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Windows systems in your environment and prioritize critical infrastructure, government, and financial systems
2. Apply Microsoft security patches immediately for affected Windows versions (Windows 7, Windows 10, Windows Server 2008 R2, 2012, 2016, 2019)
3. Implement application whitelisting to restrict Win32k API calls from untrusted processes
4. Enable Windows Defender Exploit Guard and Attack Surface Reduction rules
5. Restrict user privileges - ensure users operate with minimal necessary permissions
6. Monitor for suspicious Win32k API calls and privilege escalation attempts
7. Implement network segmentation to limit lateral movement post-exploitation
DETECTION RULES:
- Monitor for abnormal Win32k.sys access patterns
- Alert on processes attempting privilege escalation via kernel exploitation
- Track creation of SYSTEM-level processes from low-privileged user contexts
- Monitor for suspicious kernel driver loading
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أنظمة Windows في بيئتك وإعطاء الأولوية للبنية التحتية الحرجة والأنظمة الحكومية والمالية
2. تطبيق تصحيحات أمان Microsoft فوراً للإصدارات المتأثرة من Windows
3. تنفيذ قائمة بيضاء للتطبيقات لتقييد استدعاءات Win32k API من العمليات غير الموثوقة
4. تفعيل Windows Defender Exploit Guard وقواعد تقليل سطح الهجوم
5. تقييد امتيازات المستخدمين - التأكد من أن المستخدمين يعملون بأقل صلاحيات ضرورية
6. مراقبة استدعاءات Win32k API المريبة ومحاولات تصعيد الامتيازات
7. تنفيذ تقسيم الشبكة لتحديد الحركة الجانبية بعد الاستغلال
قواعد الكشف:
- مراقبة أنماط الوصول غير الطبيعية لـ Win32k.sys
- تنبيهات محاولات تصعيد الامتيازات عبر استغلال النواة
- تتبع إنشاء عمليات SYSTEM من سياقات المستخدمين منخفضي الامتيازات
- مراقبة تحميل برامج التشغيل النواة المريبة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Information security policies and procedures
ECC 2024 A.8.1.1 - User access management
ECC 2024 A.12.2.1 - Change management procedures
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
SAMA CSF ID.BE-1 - Asset management
SAMA CSF PR.AC-1 - Access control policy
SAMA CSF PR.PT-2 - Security patches and updates
SAMA CSF DE.CM-8 - Vulnerability scans
🟡 ISO 27001:2022
ISO 27001:2022 A.5.23 - Information security for supplier relationships
ISO 27001:2022 A.8.1 - User endpoint devices
ISO 27001:2022 A.8.2 - Privileged access rights
ISO 27001:2022 A.12.6.1 - Management of technical vulnerabilities
🟣 PCI DSS v4.0
PCI DSS 6.2 - Security patches for system components
PCI DSS 7.1 - Limit access to system components
PCI DSS 11.2 - Vulnerability scanning
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Win32k