INITIALIZING
📧 info@ciso.sa | 📱 +966550939344 | Riyadh, Kingdom of Saudi Arabia
🔧 Scheduled Maintenance — Saturday 2:00-4:00 AM AST. Some features may be temporarily unavailable.    ●   
💎
Pro Plan 50% Off Unlock all AI features, unlimited reports, and priority support. Upgrade
Search Center
ESC to close
Global malware Financial Services, Mobile Payments HIGH 1h Global vulnerability Government and Critical Infrastructure CRITICAL 3h Global apt Cryptocurrency and Blockchain CRITICAL 11h Global malware Financial Services / Cryptocurrency CRITICAL 12h Global insider Cloud Computing and SaaS HIGH 13h Global vulnerability Industrial Control Systems / Operational Technology CRITICAL 13h Global ransomware Corporate/Enterprise CRITICAL 14h Global ransomware Retail/E-commerce HIGH 15h Global vulnerability Software Development and AI/ML Services CRITICAL 16h Global vulnerability Healthcare, Operational Technology, Industrial Control Systems CRITICAL 18h Global malware Financial Services, Mobile Payments HIGH 1h Global vulnerability Government and Critical Infrastructure CRITICAL 3h Global apt Cryptocurrency and Blockchain CRITICAL 11h Global malware Financial Services / Cryptocurrency CRITICAL 12h Global insider Cloud Computing and SaaS HIGH 13h Global vulnerability Industrial Control Systems / Operational Technology CRITICAL 13h Global ransomware Corporate/Enterprise CRITICAL 14h Global ransomware Retail/E-commerce HIGH 15h Global vulnerability Software Development and AI/ML Services CRITICAL 16h Global vulnerability Healthcare, Operational Technology, Industrial Control Systems CRITICAL 18h Global malware Financial Services, Mobile Payments HIGH 1h Global vulnerability Government and Critical Infrastructure CRITICAL 3h Global apt Cryptocurrency and Blockchain CRITICAL 11h Global malware Financial Services / Cryptocurrency CRITICAL 12h Global insider Cloud Computing and SaaS HIGH 13h Global vulnerability Industrial Control Systems / Operational Technology CRITICAL 13h Global ransomware Corporate/Enterprise CRITICAL 14h Global ransomware Retail/E-commerce HIGH 15h Global vulnerability Software Development and AI/ML Services CRITICAL 16h Global vulnerability Healthcare, Operational Technology, Industrial Control Systems CRITICAL 18h
Vulnerabilities

CVE-2021-41357

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Microsoft Win32k Privilege Escalation Vulnerability — Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
Published: Apr 25, 2022  ·  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-2021-41357 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 affects core Windows functionality used across all sectors.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 21, 2026 09:12
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability critically impacts all Saudi sectors utilizing Windows infrastructure: Banking sector (SAMA-regulated institutions, payment processing systems), Government agencies (NCA, ministries), Healthcare (MOH facilities, private hospitals), Energy sector (ARAMCO, utilities), Telecommunications (STC, Mobily), and Critical Infrastructure. Win32k privilege escalation enables attackers to gain SYSTEM-level access, potentially compromising entire organizational networks and sensitive data.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare Energy and Utilities Telecommunications Critical Infrastructure Defense and Security
⚖️ 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
2. Apply Microsoft security patches immediately (KB5005033 or later for affected Windows versions)
3. Implement application whitelisting to restrict execution of suspicious processes
4. Enable Windows Defender Exploit Guard and Attack Surface Reduction rules

PATCHING GUIDANCE:
1. Deploy patches through WSUS or Microsoft Update for enterprise environments
2. Test patches in non-production environments first
3. Prioritize domain controllers, servers, and administrative workstations
4. Ensure all Windows 10, Windows 11, and Windows Server versions are updated

COMPENSATING CONTROLS (if immediate patching not possible):
1. Restrict user account privileges - disable unnecessary admin accounts
2. Implement privilege access management (PAM) solutions
3. Monitor and restrict Win32k API calls using AppLocker or Device Guard
4. Disable unnecessary services and features

DETECTION RULES:
1. Monitor for suspicious Win32k.sys driver interactions
2. Alert on processes attempting privilege escalation via kernel exploitation
3. Track unusual kernel-mode code execution patterns
4. Monitor for exploitation indicators: abnormal process creation from low-privilege contexts, unexpected SYSTEM-level process spawning
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أنظمة Windows في بيئتك وتحديد أولويات البنية التحتية الحرجة
2. تطبيق تصحيحات أمان Microsoft فوراً (KB5005033 أو أحدث للإصدارات المتأثرة)
3. تنفيذ قائمة بيضاء للتطبيقات لتقييد تنفيذ العمليات المريبة
4. تفعيل Windows Defender Exploit Guard وقواعد تقليل سطح الهجوم

إرشادات التصحيح:
1. نشر التصحيحات عبر WSUS أو Microsoft Update للبيئات الموزعة
2. اختبار التصحيحات في بيئات غير الإنتاج أولاً
3. إعطاء الأولوية لمتحكمات المجال والخوادم ومحطات العمل الإدارية
4. التأكد من تحديث جميع إصدارات Windows 10 و Windows 11 و Windows Server

الضوابط البديلة (إذا لم يكن التصحيح الفوري ممكناً):
1. تقييد امتيازات حساب المستخدم - تعطيل حسابات المسؤول غير الضرورية
2. تنفيذ حلول إدارة الوصول المميز (PAM)
3. مراقبة وتقييد استدعاءات Win32k API باستخدام AppLocker أو Device Guard
4. تعطيل الخدمات والميزات غير الضرورية

قواعد الكشف:
1. مراقبة تفاعلات برنامج تشغيل Win32k.sys المريبة
2. التنبيه على العمليات التي تحاول رفع الامتيازات عبر استغلال النواة
3. تتبع أنماط تنفيذ الكود في وضع النواة غير العادية
4. مراقبة مؤشرات الاستغلال: إنشاء عملية غير طبيعي من سياقات منخفضة الامتياز، وتفرخ عملية SYSTEM غير متوقعة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures A.8.1.1 - User access management A.12.2.1 - Change management procedures A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
ID.RA-1 - Asset management and vulnerability identification PR.IP-12 - System and information integrity DE.CM-8 - Vulnerability scans RS.MI-2 - Incident response and recovery
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Secure development policy A.12.2.1 - Change management A.5.1.1 - Information security policies
🟣 PCI DSS v4.0
6.2 - Security patches and updates 6.1 - Vulnerability management program 11.2 - 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
EPSS7.37%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2022-05-16
Published 2022-04-25
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
kev actively-exploited
Share this CVE
📣 Found this valuable?
Share it with your cybersecurity network
in LinkedIn 𝕏 X / Twitter 💬 WhatsApp ✈ Telegram
🍪 Privacy Preferences
CISO Consulting — Compliant with Saudi Personal Data Protection Law (PDPL)
We use cookies and similar technologies to provide the best experience on our platform. You can choose which types you accept.
🔒
Essential Always On
Required for the website to function properly. Cannot be disabled.
📋 Sessions, CSRF tokens, authentication, language preferences
📊
Analytics
Help us understand how visitors use the site and improve performance.
📋 Page views, session duration, traffic sources, performance metrics
⚙️
Functional
Enable enhanced features like content personalization and preferences.
📋 Dark/light theme, font size, custom dashboards, saved filters
📣
Marketing
Used to deliver content and ads relevant to your interests.
📋 Campaign tracking, retargeting, social media analytics
Privacy Policy →
CISO AI Assistant
Ask anything · Documents · Support
🔐

Introduce Yourself

Enter your details to access the full assistant

Your info is private and never shared
💬
CyberAssist
Online · responds in seconds
5 / 5
🔐 Verify Your Identity

Enter your email to receive a verification code before submitting a support request.

Enter to send · / for commands 0 / 2000
CISO AI · Powered by Anthropic Claude
✦ Quick Survey Help Us Improve CISO Consulting Your feedback shapes the future of our platform — takes less than 2 minutes.
⚠ Please answer this question to continue

How would you rate your overall experience with our platform?

Rate from 1 (poor) to 5 (excellent)

🎉
Thank you!
Your response has been recorded.