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Global data_breach Multiple sectors HIGH 57m Global vulnerability Government and Critical Infrastructure CRITICAL 1h Global vulnerability Multiple sectors CRITICAL 1h Global apt Financial Services, Government HIGH 1h Global insider Cross-sector CRITICAL 2h Global vulnerability Multiple sectors CRITICAL 2h Global vulnerability Information Technology / Software Infrastructure CRITICAL 2h Global data_breach Healthcare CRITICAL 2h Global malware Financial Services HIGH 2h Global vulnerability Technology/Software Development HIGH 3h Global data_breach Multiple sectors HIGH 57m Global vulnerability Government and Critical Infrastructure CRITICAL 1h Global vulnerability Multiple sectors CRITICAL 1h Global apt Financial Services, Government HIGH 1h Global insider Cross-sector CRITICAL 2h Global vulnerability Multiple sectors CRITICAL 2h Global vulnerability Information Technology / Software Infrastructure CRITICAL 2h Global data_breach Healthcare CRITICAL 2h Global malware Financial Services HIGH 2h Global vulnerability Technology/Software Development HIGH 3h Global data_breach Multiple sectors HIGH 57m Global vulnerability Government and Critical Infrastructure CRITICAL 1h Global vulnerability Multiple sectors CRITICAL 1h Global apt Financial Services, Government HIGH 1h Global insider Cross-sector CRITICAL 2h Global vulnerability Multiple sectors CRITICAL 2h Global vulnerability Information Technology / Software Infrastructure CRITICAL 2h Global data_breach Healthcare CRITICAL 2h Global malware Financial Services HIGH 2h Global vulnerability Technology/Software Development HIGH 3h
Vulnerabilities

CVE-2021-1732

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Microsoft Win32k Privilege Escalation Vulnerability — Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
Published: Nov 3, 2021  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Microsoft Win32k Privilege Escalation Vulnerability — Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.

🤖 AI Executive Summary

CVE-2021-1732 is a critical privilege escalation vulnerability in Microsoft Win32k with a CVSS score of 9.0, allowing attackers to escalate privileges on affected Windows systems. With public exploits available, this poses an immediate threat to Saudi organizations relying on Windows infrastructure. Patching is urgent as the vulnerability can be exploited locally to gain system-level access.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 19, 2026 20:48
🇸🇦 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). Windows-based workstations and servers are ubiquitous across these sectors. Local privilege escalation could enable lateral movement, data exfiltration, and system compromise. Government critical infrastructure and financial systems are particularly vulnerable.
🏢 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
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Windows systems in your environment using asset management tools
2. Prioritize patching for systems in critical infrastructure, banking, and government networks
3. Apply Microsoft security updates KB5001631 or later immediately
4. Implement application whitelisting to restrict execution of suspicious processes

PATCHING GUIDANCE:
1. Deploy patches through WSUS or Microsoft Update for enterprise environments
2. Test patches in non-production environments first
3. Schedule patching during maintenance windows with minimal business impact
4. Verify patch installation using 'systeminfo' command to confirm OS build version

COMPENSATING CONTROLS (if immediate patching not possible):
1. Restrict local administrative access and enforce principle of least privilege
2. Disable unnecessary services and features in Win32k subsystem
3. Enable Windows Defender Exploit Guard and Attack Surface Reduction rules
4. Monitor for suspicious Win32k API calls and privilege escalation attempts

DETECTION RULES:
1. Monitor Event ID 4688 (Process Creation) for unusual Win32k-related process spawning
2. Alert on processes attempting to access kernel objects with elevated privileges
3. Track failed privilege escalation attempts in Security Event Log
4. Monitor for suspicious DLL injection into system processes
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أنظمة Windows في بيئتك باستخدام أدوات إدارة الأصول
2. إعطاء الأولوية لتصحيح الأنظمة في البنية التحتية الحرجة والشبكات الحكومية والمصرفية
3. تطبيق تحديثات أمان Microsoft KB5001631 أو أحدث فوراً
4. تنفيذ قائمة التطبيقات المسموحة لتقييد تنفيذ العمليات المريبة

إرشادات التصحيح:
1. نشر التصحيحات عبر WSUS أو Microsoft Update للبيئات الموزعة
2. اختبار التصحيحات في بيئات غير الإنتاج أولاً
3. جدولة التصحيح خلال نوافذ الصيانة بأقل تأثير على الأعمال
4. التحقق من تثبيت التصحيح باستخدام أمر 'systeminfo' لتأكيد إصدار نظام التشغيل

الضوابط البديلة (إذا لم يكن التصحيح الفوري ممكناً):
1. تقييد الوصول الإداري المحلي وفرض مبدأ أقل امتياز
2. تعطيل الخدمات والميزات غير الضرورية في نظام Win32k الفرعي
3. تفعيل Windows Defender Exploit Guard وقواعد تقليل سطح الهجوم
4. مراقبة استدعاءات Win32k API المريبة ومحاولات تصعيد الامتيازات

قواعد الكشف:
1. مراقبة معرف الحدث 4688 (إنشاء العملية) للعمليات المرتبطة بـ Win32k غير العادية
2. التنبيه على العمليات التي تحاول الوصول إلى كائنات النواة بامتيازات مرتفعة
3. تتبع محاولات تصعيد الامتيازات الفاشلة في سجل أحداث الأمان
4. مراقبة حقن DLL المريب في عمليات النظام
📋 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 - Access Rights Review ECC 2024 A.8.1.1 - Information Security Awareness ECC 2024 A.12.2.1 - Restrictions on Software Installation
🔵 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 Management SAMA CSF DE.CM-1 - System Monitoring SAMA CSF RS.MI-2 - Incident Response Procedures
🟡 ISO 27001:2022
ISO 27001:2022 A.5.15 - Access Control 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 Access Restriction ISO 27001:2022 A.12.6.1 - Management of Technical Vulnerabilities
🟣 PCI DSS v4.0
PCI DSS 2.2.4 - Configure System Security Parameters PCI DSS 6.2 - Ensure Security Patches Installed PCI DSS 11.2.2 - Vulnerability Scanning
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Microsoft:Win32k
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS90.42%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2021-11-17
Published 2021-11-03
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited ransomware
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