📄 Description (English)
Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally.
🤖 AI Executive Summary
CVE-2026-24283 is a heap-based buffer overflow vulnerability in Windows File Server affecting Windows 11 (24H2, 25H2, 26H1) and Windows Server 2022/2025. An authorized local attacker can exploit this to elevate privileges. With a CVSS score of 8.8 and no public exploit currently available, this poses a significant risk to Saudi organizations relying on Windows infrastructure for file sharing and server operations.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 18:40
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability directly impacts Saudi government entities (NCA, CITC), banking sector (SAMA-regulated institutions, major banks), healthcare organizations (MOH facilities), energy sector (ARAMCO, SEC), and telecommunications (STC, Mobily). Windows Server 2022/2025 are widely deployed in Saudi data centers and government infrastructure. The privilege escalation capability poses critical risk to confidentiality, integrity, and availability of sensitive national data and financial systems. Organizations managing classified information or critical infrastructure are at highest risk.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Telecommunications
Education
Defense and Security
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Windows 11 (24H2, 25H2, 26H1) and Windows Server 2022/2025 systems in your environment using asset management tools
2. Restrict local access to file server services; implement principle of least privilege for user accounts
3. Monitor Windows Event Viewer for privilege escalation attempts (Event ID 4688, 4689, 4719)
4. Disable unnecessary file sharing protocols if not required
PATCHING GUIDANCE:
1. Apply Microsoft security updates immediately upon release (monitor Microsoft Security Update Guide)
2. Prioritize patching for systems handling sensitive data or critical operations
3. Test patches in non-production environment first
4. Schedule patching during maintenance windows with stakeholder approval
COMPENSATING CONTROLS (if patch unavailable):
1. Implement application whitelisting to prevent unauthorized privilege escalation tools
2. Enable Windows Defender Exploit Guard and Attack Surface Reduction rules
3. Use Windows Sandbox or virtualization to isolate file server services
4. Implement network segmentation to limit lateral movement
DETECTION RULES:
1. Monitor for abnormal heap memory access patterns in svchost.exe and file server processes
2. Alert on unexpected privilege escalation from service accounts
3. Track modifications to file server configuration files
4. Monitor for suspicious use of Windows API calls related to memory manipulation
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أنظمة Windows 11 و Windows Server 2022/2025 في بيئتك باستخدام أدوات إدارة الأصول
2. تقييد الوصول المحلي لخدمات خادم الملفات؛ تطبيق مبدأ أقل امتياز للحسابات
3. مراقبة سجل أحداث Windows للكشف عن محاولات رفع الامتيازات
4. تعطيل بروتوكولات مشاركة الملفات غير الضرورية
إرشادات التصحيح:
1. تطبيق تحديثات أمان Microsoft فوراً عند إصدارها
2. إعطاء الأولوية لتصحيح الأنظمة التي تتعامل مع البيانات الحساسة
3. اختبار التصحيحات في بيئة غير الإنتاج أولاً
4. جدولة التصحيح خلال نوافذ الصيانة
الضوابط البديلة:
1. تطبيق قائمة بيضاء للتطبيقات لمنع أدوات رفع الامتيازات غير المصرح بها
2. تفعيل Windows Defender Exploit Guard
3. استخدام Windows Sandbox لعزل خدمات خادم الملفات
4. تطبيق تقسيم الشبكة لتحديد الحركة الجانبية
قواعد الكشف:
1. مراقبة أنماط الوصول غير الطبيعية للذاكرة المكدسة
2. تنبيهات رفع الامتيازات غير المتوقعة
3. تتبع تعديلات ملفات تكوين خادم الملفات
4. مراقبة الاستخدام المريب لاستدعاءات Windows API
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.5.1.1 - Access Control Policies
ECC 2024 A.6.1.2 - Privilege Management
ECC 2024 A.8.2.3 - System Hardening
ECC 2024 A.12.2.1 - Change Management
ECC 2024 A.12.6.1 - Vulnerability Management
🔵 SAMA CSF
SAMA CSF ID.AM-2 - Asset Management
SAMA CSF PR.AC-1 - Access Control
SAMA CSF PR.PT-2 - Protective Technology
SAMA CSF DE.CM-1 - Detection Processes
SAMA CSF RS.MI-2 - Incident Response
🟡 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.12.6.1 - Management of Technical Vulnerabilities
ISO 27001:2022 A.14.2.1 - Secure Development Policy
🟣 PCI DSS v4.0
PCI DSS 2.2.4 - Configure System Security Parameters
PCI DSS 6.2 - Ensure Security Patches Installed
PCI DSS 7.1 - Limit Access to System Components
PCI DSS 10.2.5 - Restrict Access to Audit Trails
📦 Affected Products / CPE 8 entries
microsoft:windows_11_24h2
microsoft:windows_11_24h2
microsoft:windows_11_25h2
microsoft:windows_11_25h2
microsoft:windows_11_26h1
microsoft:windows_11_26h1
microsoft:windows_server_2022_23h2
microsoft:windows_server_2025