📄 الوصف (الإنجليزية)
Improper input validation in Microsoft Office SharePoint allows an unauthorized attacker to execute code locally.
🤖 ملخص AI
CVE-2026-20951 is a high-severity vulnerability in Microsoft SharePoint Server affecting versions 2016, 2019, and subscription editions. The improper input validation flaw allows unauthorized attackers to execute arbitrary code locally on affected systems. With a CVSS score of 7.8 and no public exploit currently available, immediate patching is critical for Saudi organizations heavily reliant on SharePoint for document management and collaboration.
📄 الوصف (العربية)
🤖 التحليل الذكي آخر تحليل: Apr 28, 2026 12:04
🇸🇦 التأثير على المملكة العربية السعودية
This vulnerability poses significant risk to Saudi government entities, ARAMCO, banking sector (SAMA-regulated institutions), and large enterprises using SharePoint for critical document management. Government agencies relying on SharePoint for classified document handling face elevated risk. The financial sector, particularly banks and fintech companies, could experience operational disruption. Telecommunications companies (STC, Mobily) and healthcare institutions using SharePoint for patient records and internal communications are also at risk. The local code execution capability makes this particularly dangerous in environments with privileged user access.
🏢 القطاعات السعودية المتأثرة
Government and Public Administration
Banking and Financial Services
Energy (ARAMCO and subsidiaries)
Telecommunications (STC, Mobily, Zain)
Healthcare and Medical Institutions
Education and Universities
Large Enterprises and Corporations
🎯 تقنيات MITRE ATT&CK
⚖️ درجة المخاطر السعودية (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Inventory all SharePoint Server deployments (2016, 2019, subscription editions) across your organization
2. Restrict local access to SharePoint servers to authorized personnel only
3. Implement network segmentation to isolate SharePoint infrastructure
4. Enable enhanced logging and monitoring on SharePoint servers
PATCHING GUIDANCE:
1. Apply Microsoft security patches immediately upon availability from Windows Update or WSUS
2. Test patches in non-production environments first
3. Prioritize patching for internet-facing or high-value SharePoint instances
4. Schedule maintenance windows for production systems
COMPENSATING CONTROLS (if patching delayed):
1. Implement application whitelisting on SharePoint servers
2. Disable unnecessary SharePoint features and services
3. Apply principle of least privilege to SharePoint service accounts
4. Monitor for suspicious process execution and file modifications
DETECTION RULES:
1. Monitor for unexpected code execution from SharePoint processes (w3wp.exe, owstimer.exe)
2. Alert on unusual file uploads to SharePoint content databases
3. Track failed authentication attempts to SharePoint admin interfaces
4. Monitor for suspicious PowerShell execution from SharePoint contexts
5. Implement YARA rules for malicious input patterns targeting SharePoint parsing functions
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع نشرات خادم SharePoint (2016 و2019 والإصدارات المشتركة) عبر مؤسستك
2. قيد الوصول المحلي إلى خوادم SharePoint للموظفين المصرح لهم فقط
3. طبق تقسيم الشبكة لعزل بنية SharePoint
4. فعّل السجلات والمراقبة المحسّنة على خوادم SharePoint
إرشادات التصحيح:
1. طبق تصحيحات أمان Microsoft فورًا عند توفرها من Windows Update أو WSUS
2. اختبر التصحيحات في بيئات غير الإنتاج أولاً
3. أعطِ الأولوية لتصحيح نوادي SharePoint المتصلة بالإنترنت أو عالية القيمة
4. جدول نوافذ الصيانة لأنظمة الإنتاج
الضوابط البديلة (إذا تأخر التصحيح):
1. طبق قائمة بيضاء للتطبيقات على خوادم SharePoint
2. عطّل ميزات وخدمات SharePoint غير الضرورية
3. طبق مبدأ أقل امتياز على حسابات خدمة SharePoint
4. راقب تنفيذ العمليات والتعديلات على الملفات المريبة
قواعد الكشف:
1. راقب تنفيذ الكود غير المتوقع من عمليات SharePoint
2. أصدر تنبيهات عند تحميل ملفات غير عادية إلى قواعد بيانات محتوى SharePoint
3. تتبع محاولات المصادقة الفاشلة لواجهات إدارة SharePoint
4. راقب تنفيذ PowerShell المريب من سياقات SharePoint
5. طبق قواعد YARA للمدخلات الضارة التي تستهدف وظائف تحليل SharePoint
📋 خريطة الامتثال التنظيمي
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures
A.6.1.1 - Access Control Policy
A.6.2.1 - User Registration and De-registration
A.8.2.1 - Classification of Information
A.12.2.1 - Restrictions on Software Installation
A.12.4.1 - Event Logging
A.12.4.3 - Administrator and Operator Logs
A.14.2.1 - Secure Development Policy
🔵 SAMA CSF
ID.AM-2 - Software Inventory
PR.AC-1 - Access Control Policy
PR.AC-4 - Access Rights Management
PR.DS-2 - Data Security
PR.PT-1 - Security Awareness and Training
DE.AE-1 - Anomalies and Events Detection
DE.CM-1 - System Monitoring
RS.RP-1 - Response Planning
🟡 ISO 27001:2022
A.5.1.1 - Information Security Policies
A.6.1.1 - Access Control
A.8.1.1 - Asset Management
A.12.2.1 - Restrictions on Software Installation
A.12.4.1 - Event Logging
A.14.2.1 - Secure Development
A.14.2.5 - Secure Development Environment
📦 المنتجات المتأثرة 3 منتج
microsoft:sharepoint_server
microsoft:sharepoint_server:2016
microsoft:sharepoint_server:2019