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Vulnerabilities

CVE-2026-32216

Medium
CWE-476 — Weakness Type
Published: Apr 14, 2026  ·  Modified: Apr 17, 2026  ·  Source: NVD
CVSS v3
5.5
🔗 NVD Official
📄 Description (English)

Null pointer dereference in Windows Redirected Drive Buffering allows an authorized attacker to deny service locally.

🤖 AI Executive Summary

CVE-2026-32216 is a medium-severity null pointer dereference vulnerability in Windows Redirected Drive Buffering that allows authorized local attackers to cause denial of service. With no available patch and no public exploit, this represents a moderate risk requiring immediate monitoring and compensating controls. The vulnerability affects Windows systems utilizing redirected drive functionality, commonly deployed in enterprise remote access and virtual desktop environments.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 26, 2026 02:10
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi government agencies, financial institutions, and large enterprises utilizing Windows remote access infrastructure (VDI/RDP). SAMA-regulated banks and financial institutions using redirected drive functionality for secure document handling face operational disruption risks. Government entities under NCA oversight, particularly those with hybrid work environments, are vulnerable to localized DoS attacks. Telecom operators (STC, Mobily) and energy sector organizations (ARAMCO) with extensive remote workforce infrastructure are at moderate risk. Healthcare organizations using Windows-based remote access systems could experience service interruptions affecting patient care systems.
🏢 Affected Saudi Sectors
Government Banking and Financial Services Telecommunications Energy and Utilities Healthcare Large Enterprises with Remote Workforce
⚖️ Saudi Risk Score (AI)
5.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all Windows systems with Redirected Drive Buffering enabled, particularly in remote access/VDI environments
2. Restrict local administrative access and enforce principle of least privilege for user accounts
3. Implement network segmentation to limit lateral movement from compromised local sessions
4. Enable Windows Event Logging for process creation and handle operations (Event ID 10)

Compensating Controls (pending patch availability):
5. Deploy application whitelisting to prevent unauthorized process execution
6. Monitor for abnormal process termination and system crashes related to redirected drive operations
7. Implement resource limits and process isolation using Windows Job Objects
8. Configure Windows Defender Application Guard for high-risk remote access scenarios

Detection Rules:
9. Alert on null pointer dereference exceptions in rdpdr.sys driver logs
10. Monitor for repeated system crashes or service restarts on redirected drive access
11. Track failed handle operations and memory access violations in Windows Event Viewer
12. Establish baseline for normal redirected drive buffer operations and alert on deviations

Patching Strategy:
13. Subscribe to Microsoft Security Update Guide for CVE-2026-32216 patch release
14. Prepare test environment for patch validation before enterprise deployment
15. Maintain incident response procedures for DoS scenarios until patch is available
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حصر جميع أنظمة Windows مع تفعيل Redirected Drive Buffering، خاصة في بيئات الوصول البعيد/VDI
2. تقييد الوصول الإداري المحلي وفرض مبدأ الامتيازات الأقل للحسابات
3. تنفيذ تقسيم الشبكة لتحديد الحركة الجانبية من الجلسات المخترقة
4. تفعيل تسجيل أحداث Windows لإنشاء العمليات وعمليات المقابض (Event ID 10)

الضوابط التعويضية (في انتظار توفر التصحيح):
5. نشر قائمة بيضاء للتطبيقات لمنع تنفيذ العمليات غير المصرح بها
6. مراقبة إنهاء العمليات غير الطبيعية وأعطال النظام المتعلقة بعمليات الأقراص المعاد توجيهها
7. تنفيذ حدود الموارد وعزل العمليات باستخدام Windows Job Objects
8. تكوين Windows Defender Application Guard لسيناريوهات الوصول البعيد عالية المخاطر

قواعد الكشف:
9. تنبيهات على استثناءات إلغاء المؤشر الفارغ في سجلات برنامج تشغيل rdpdr.sys
10. مراقبة أعطال النظام المتكررة أو إعادة تشغيل الخدمات على الوصول إلى الأقراص المعاد توجيهها
11. تتبع عمليات المقابض الفاشلة وانتهاكات الوصول إلى الذاكرة في عارض أحداث Windows
12. إنشاء خط أساس للعمليات العادية للأقراص المعاد توجيهها والتنبيه عند الانحرافات

استراتيجية التصحيح:
13. الاشتراك في دليل تحديث أمان Microsoft للحصول على إصدار تصحيح CVE-2026-32216
14. تحضير بيئة اختبار للتحقق من صحة التصحيح قبل النشر على مستوى المؤسسة
15. الحفاظ على إجراءات الاستجابة للحوادث لسيناريوهات رفض الخدمة حتى توفر التصحيح
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures A.8.1.1 - User access management and authorization 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.AC-1 - Access control and authentication DE.CM-8 - Vulnerability scans and system monitoring RS.MI-2 - Incident response and mitigation
🟡 ISO 27001:2022
A.12.6.1 - Management of technical vulnerabilities A.14.2.1 - Change management A.5.1.1 - Information security policies A.8.1.1 - User access management
📊 CVSS Score
5.5
/ 10.0 — Medium
📊 CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack VectorL — Low / Local
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityN — None / Network
IntegrityN — None / Network
AvailabilityH — High
📋 Quick Facts
Severity Medium
CVSS Score5.5
CWECWE-476
EPSS0.04%
Exploit No
Patch ✗ No
Published 2026-04-14
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
5.2
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-476
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