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Vulnerabilities

CVE-2026-20806

Medium
CWE-843 — Weakness Type
Published: Apr 14, 2026  ·  Modified: Apr 15, 2026  ·  Source: NVD
CVSS v3
5.5
🔗 NVD Official
📄 Description (English)

Access of resource using incompatible type ('type confusion') in Windows COM allows an authorized attacker to disclose information locally.

🤖 AI Executive Summary

CVE-2026-20806 is a type confusion vulnerability in Windows COM that allows authorized local attackers to disclose sensitive information. With a CVSS score of 5.5 and no available patch, this vulnerability requires immediate compensating controls. The lack of public exploits provides a temporary window for organizations to implement mitigations before threat actors develop attack code.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 25, 2026 18:33
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily affects Saudi organizations running Windows-based infrastructure, particularly in banking (SAMA-regulated institutions), government agencies (NCA oversight), healthcare systems, and energy sector operations. The requirement for local/authorized access limits exposure, but insider threats and compromised service accounts pose significant risk. Organizations with legacy COM-dependent applications face elevated risk, particularly in financial services where COM is prevalent in trading and settlement systems.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare Energy and Utilities Telecommunications Manufacturing Insurance
⚖️ Saudi Risk Score (AI)
6.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all systems using Windows COM components and identify critical applications dependent on COM interfaces
2. Implement strict access controls limiting local system access to authorized personnel only
3. Enable Windows Defender Application Guard for high-risk COM-dependent applications
4. Implement privileged access management (PAM) solutions to monitor and control service account activities

Compensating Controls (pending patch availability):
5. Deploy application whitelisting to restrict COM object instantiation
6. Configure Windows Event Viewer to log COM object creation and access attempts (Event ID 4688 with command line logging)
7. Implement Data Loss Prevention (DLP) tools to monitor sensitive data access patterns
8. Restrict COM+ Services access through DCOM hardening via Group Policy
9. Monitor for suspicious COM object type casting in application logs

Detection Rules:
- Alert on unusual COM object instantiation from non-standard processes
- Monitor for COMException errors related to type mismatches
- Track access to sensitive registry keys under HKEY_CLASSES_ROOT\CLSID
- Flag processes attempting to access COM objects with mismatched interface types
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حصر جميع الأنظمة التي تستخدم مكونات Windows COM وتحديد التطبيقات الحرجة المعتمدة على واجهات COM
2. تطبيق ضوابط وصول صارمة تحد من الوصول المحلي للنظام للموظفين المصرحين فقط
3. تفعيل Windows Defender Application Guard للتطبيقات عالية المخاطر المعتمدة على COM
4. تطبيق حلول إدارة الوصول المميز (PAM) لمراقبة ومراقبة أنشطة حسابات الخدمة

الضوابط التعويضية (في انتظار توفر التصحيح):
5. نشر قائمة بيضاء للتطبيقات لتقييد إنشاء كائنات COM
6. تكوين Windows Event Viewer لتسجيل إنشاء كائنات COM ومحاولات الوصول (معرف الحدث 4688 مع تسجيل سطر الأوامر)
7. تطبيق أدوات منع فقدان البيانات (DLP) لمراقبة أنماط الوصول إلى البيانات الحساسة
8. تقييد وصول خدمات COM+ من خلال تقسية DCOM عبر Group Policy
9. مراقبة محاولات تحويل نوع كائن COM المريبة في سجلات التطبيق

قواعد الكشف:
- تنبيه عند إنشاء كائن COM غير عادي من عمليات غير قياسية
- مراقبة أخطاء COMException المتعلقة بعدم تطابق الأنواع
- تتبع الوصول إلى مفاتيح التسجيل الحساسة ضمن HKEY_CLASSES_ROOT\CLSID
- وضع علم على العمليات التي تحاول الوصول إلى كائنات COM بأنواع واجهات غير متطابقة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policy ECC 2024 A.6.1.2 - User Registration and De-registration ECC 2024 A.8.2.1 - User Access Management ECC 2024 A.12.4.1 - Event Logging ECC 2024 A.12.4.3 - Administrator and Operator Logs
🔵 SAMA CSF
ID.AM-2 - Software Inventory PR.AC-1 - Identity and Access Management PR.AC-4 - Access Rights Management DE.CM-1 - System Monitoring DE.AE-1 - Audit Logs
🟡 ISO 27001:2022
A.5.15 - Access Control A.8.1.1 - User Registration and De-registration A.8.2.1 - User Access Management A.8.2.3 - Management of Privileged Access Rights A.12.4.1 - Event Logging
🟣 PCI DSS v4.0.1
Requirement 2.1 - Configuration Standards Requirement 7 - Restrict Access to Data Requirement 8 - User Identification and Authentication Requirement 10 - Logging and Monitoring
📊 CVSS Score
5.5
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityN — None / Network
AvailabilityN — None / Network
📋 Quick Facts
Severity Medium
CVSS Score5.5
CWECWE-843
EPSS0.13%
Exploit No
Patch ✗ No
Published 2026-04-14
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
6.2
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-843
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