📄 Description (English)
Improper input validation in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
🤖 AI Executive Summary
CVE-2026-26106 is a high-severity remote code execution vulnerability in Microsoft SharePoint Server affecting versions 2016, 2019, and subscription editions. An authorized attacker can exploit improper input validation to execute arbitrary code over the network. With a CVSS score of 8.8 and no public exploit currently available, this vulnerability poses significant risk to organizations using SharePoint for document management and collaboration.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 22, 2026 20:52
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability significantly impacts Saudi government entities, financial institutions, and large enterprises that rely on SharePoint for document management and collaboration. High-risk sectors include: Banking sector (SAMA-regulated institutions managing sensitive financial data), Government agencies (NCA, ministries using SharePoint for internal communications), Healthcare organizations (managing patient records), Energy sector (ARAMCO and subsidiaries), and Telecommunications (STC, Mobily). The threat is elevated due to the authorized-user requirement, making insider threats and compromised account scenarios particularly concerning in Saudi organizations.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Telecommunications
Education
Large Enterprises
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all SharePoint Server instances (2016, 2019, subscription editions) in your environment
2. Audit user access logs for suspicious activity from authorized accounts
3. Implement network segmentation to restrict SharePoint access to trusted networks only
4. Enable enhanced logging and monitoring for SharePoint activities
Patching Guidance:
1. Apply Microsoft security patches immediately upon availability from Windows Update or Microsoft Update Catalog
2. Test patches in non-production environments first
3. Prioritize patching for internet-facing SharePoint instances
4. Schedule patching during maintenance windows to minimize business disruption
Compensating Controls (if patching delayed):
1. Restrict SharePoint access to specific IP ranges and VPN connections
2. Implement multi-factor authentication (MFA) for all SharePoint users
3. Disable unnecessary SharePoint features and web parts
4. Monitor for suspicious PowerShell commands and custom solutions
Detection Rules:
1. Monitor for unusual file uploads or modifications in SharePoint document libraries
2. Alert on execution of unexpected code or scripts within SharePoint context
3. Track failed and successful authentication attempts to SharePoint
4. Monitor for suspicious custom solutions or web parts being deployed
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع مثيلات خادم SharePoint (الإصدارات 2016 و2019 والإصدارات الاشتراكية) في بيئتك
2. مراجعة سجلات الوصول للكشف عن النشاط المريب من الحسابات المصرح لها
3. تطبيق تقسيم الشبكة لتقييد الوصول إلى SharePoint من الشبكات الموثوقة فقط
4. تفعيل السجلات المحسنة والمراقبة لأنشطة SharePoint
إرشادات التصحيح:
1. تطبيق تصحيحات أمان Microsoft فوراً عند توفرها من Windows Update أو Microsoft Update Catalog
2. اختبار التصحيحات في بيئات غير الإنتاج أولاً
3. إعطاء الأولوية لتصحيح مثيلات SharePoint المتصلة بالإنترنت
4. جدولة التصحيحات خلال نوافذ الصيانة لتقليل انقطاع الأعمال
الضوابط البديلة (إذا تأخر التصحيح):
1. تقييد الوصول إلى SharePoint لنطاقات IP محددة واتصالات VPN
2. تطبيق المصادقة متعددة العوامل (MFA) لجميع مستخدمي SharePoint
3. تعطيل ميزات SharePoint والأجزاء غير الضرورية
4. مراقبة أوامر PowerShell المريبة والحلول المخصصة
قواعد الكشف:
1. مراقبة تحميلات الملفات غير العادية أو التعديلات في مكتبات مستندات SharePoint
2. التنبيه على تنفيذ أكواد أو نصوص برمجية غير متوقعة ضمن سياق SharePoint
3. تتبع محاولات المصادقة الفاشلة والناجحة لـ SharePoint
4. مراقبة الحلول المخصصة أو أجزاء الويب المريبة التي يتم نشرها
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures
A.8.1.1 - User access management and authentication
A.12.2.1 - Change management procedures
A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
ID.BE-1 - Business objectives and strategies
PR.AC-1 - Access control policy and procedures
PR.PT-1 - Security awareness and training
DE.CM-1 - Asset anomalies and behavior monitoring
RS.RP-1 - Response and recovery planning
🟡 ISO 27001:2022
A.5.1.1 - Information security policies
A.6.1.1 - Information security roles and responsibilities
A.8.1.1 - User registration and de-registration
A.12.2.1 - Change management
A.12.6.1 - Management of technical vulnerabilities
🟣 PCI DSS v4.0
Requirement 6.2 - Security patches and updates
Requirement 6.5.1 - Injection flaws prevention
Requirement 8.1 - User identification and authentication
📦 Affected Products / CPE 3 entries
microsoft:sharepoint_server
microsoft:sharepoint_server:2016
microsoft:sharepoint_server:2019