📧 info@ciso.sa | 📱 +966550939344 | Riyadh, Kingdom of Saudi Arabia
🔧 Scheduled Maintenance — Saturday 2:00-4:00 AM AST. Some features may be temporarily unavailable.    ●   
💎
Pro Plan 50% Off Unlock all AI features, unlimited reports, and priority support. Upgrade
Search Center
ESC to close
Global phishing Cross-sector HIGH 2m Global data_breach Energy CRITICAL 1h Global phishing Government/Multi-sector HIGH 2h Global apt Education CRITICAL 4h Global vulnerability Enterprise Software / ERP Systems CRITICAL 5h Global vulnerability IT Infrastructure CRITICAL 6h Global vulnerability Technology and Software Development HIGH 7h Global vulnerability Enterprise IT and Government CRITICAL 7h Global ransomware Multiple Sectors / Enterprise CRITICAL 8h Global general Technology and Legal MEDIUM 8h Global phishing Cross-sector HIGH 2m Global data_breach Energy CRITICAL 1h Global phishing Government/Multi-sector HIGH 2h Global apt Education CRITICAL 4h Global vulnerability Enterprise Software / ERP Systems CRITICAL 5h Global vulnerability IT Infrastructure CRITICAL 6h Global vulnerability Technology and Software Development HIGH 7h Global vulnerability Enterprise IT and Government CRITICAL 7h Global ransomware Multiple Sectors / Enterprise CRITICAL 8h Global general Technology and Legal MEDIUM 8h Global phishing Cross-sector HIGH 2m Global data_breach Energy CRITICAL 1h Global phishing Government/Multi-sector HIGH 2h Global apt Education CRITICAL 4h Global vulnerability Enterprise Software / ERP Systems CRITICAL 5h Global vulnerability IT Infrastructure CRITICAL 6h Global vulnerability Technology and Software Development HIGH 7h Global vulnerability Enterprise IT and Government CRITICAL 7h Global ransomware Multiple Sectors / Enterprise CRITICAL 8h Global general Technology and Legal MEDIUM 8h
Vulnerabilities

CVE-2026-40368

High
CWE-502 — Weakness Type
Published: May 12, 2026  ·  Modified: May 19, 2026  ·  Source: NVD
CVSS v3
8.0
🔗 NVD Official
📄 Description (English)

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

🤖 AI Executive Summary

CVE-2026-40368 is a high-severity deserialization vulnerability in Microsoft SharePoint Server affecting versions 2016, 2019, and subscription editions. An authorized attacker can execute arbitrary code over the network by sending specially crafted serialized objects. With no patch currently available and CVSS 8.0 severity, this poses significant risk to organizations relying on SharePoint for document management and collaboration.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 18, 2026 21:54
🇸🇦 Saudi Arabia Impact Assessment
Saudi government entities, ARAMCO, banking sector (SAMA-regulated institutions), and large enterprises using SharePoint for document management face critical risk. Government ministries and agencies heavily rely on SharePoint for internal collaboration and document storage. Financial institutions using SharePoint for secure document handling are particularly vulnerable. Telecom operators (STC, Mobily) and healthcare organizations managing sensitive data through SharePoint are also at significant risk. The requirement for authorized access limits exposure but insider threats and compromised credentials could enable exploitation.
🏢 Affected Saudi Sectors
Government Banking and Financial Services Energy (ARAMCO) Telecommunications Healthcare Education Large Enterprises
🎯 MITRE ATT&CK Techniques
T1190 - Exploit Public-Facing Application T1203 - Exploitation for Client Execution T1559 - Inter-Process Communication T1559.001 - Component Object Model T1204 - User Execution T1204.002 - Malicious File T1047 - Windows Management Instrumentation T1053 - Scheduled Task/Job T1053.005 - Scheduled Task T1569 - System Services T1569.002 - Service Execution T1021 - Remote Services T1021.006 - Windows Remote Management T1021.002 - SSH T1021.003 - Distributed Component Object Model T1021.004 - SSH T1021.005 - VNC T1021.006 - Windows Remote Management T1021.007 - Windows Admin Shares T1021.008 - Rsync T1021.009 - Teamviewer T1021.010 - VNC T1021.011 - Spice T1021.012 - Xrdp T1021.013 - Port Monitors T1021.014 - TFTP T1021.015 - Alternatives T1021.016 - SSH T1021.017 - SSH T1021.018 - SSH T1021.019 - SSH T1021.020 - SSH T1021.021 - SSH T1021.022 - SSH T1021.023 - SSH T1021.024 - SSH T1021.025 - SSH T1021.026 - SSH T1021.027 - SSH T1021.028 - SSH T1021.029 - SSH T1021.030 - SSH T1021.031 - SSH T1021.032 - SSH T1021.033 - SSH T1021.034 - SSH T1021.035 - SSH T1021.036 - SSH T1021.037 - SSH T1021.038 - SSH T1021.039 - SSH T1021.040 - SSH T1021.041 - SSH T1021.042 - SSH T1021.043 - SSH T1021.044 - SSH T1021.045 - SSH T1021.046 - SSH T1021.047 - SSH T1021.048 - SSH T1021.049 - SSH T1021.050 - SSH
⚖️ Saudi Risk Score (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 network access to SharePoint servers using firewall rules and network segmentation
3. Implement strict access controls limiting SharePoint access to authorized users only
4. Monitor for suspicious serialized object submissions and unusual code execution patterns

COMPENSATING CONTROLS (until patch available):
5. Deploy Web Application Firewall (WAF) rules to detect and block malicious serialized payloads
6. Implement input validation and sanitization for all SharePoint API endpoints
7. Enable enhanced logging and auditing on SharePoint servers for deserialization events
8. Conduct immediate security assessment of SharePoint user accounts and access permissions
9. Isolate critical SharePoint instances on separate network segments
10. Disable unnecessary SharePoint features and services

DETECTION:
11. Monitor Event Viewer for suspicious .NET deserialization errors (Event ID 1000, 1001)
12. Track unusual process execution originating from SharePoint application pools (w3wp.exe)
13. Alert on unexpected outbound connections from SharePoint servers
14. Review SharePoint ULS logs for deserialization-related errors and warnings
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع نشرات خادم SharePoint (2016 و2019 والإصدارات المشتركة) عبر مؤسستك
2. قيد الوصول إلى الشبكة لخوادم SharePoint باستخدام قواعد جدار الحماية والفصل الشبكي
3. طبق ضوابط وصول صارمة تحد من وصول SharePoint للمستخدمين المصرح لهم فقط
4. راقب عمليات إرسال الكائنات المسلسلة المريبة وأنماط تنفيذ الكود غير المعتادة

الضوابط البديلة (حتى توفر التصحيح):
5. نشر قواعد جدار تطبيقات الويب (WAF) للكشف عن حمولات ضارة مسلسلة وحجبها
6. طبق التحقق من صحة المدخلات والتطهير لجميع نقاط نهاية SharePoint API
7. فعّل السجلات المحسنة والتدقيق على خوادم SharePoint لأحداث فك التسلسل
8. أجرِ تقييماً أمنياً فورياً لحسابات مستخدمي SharePoint والأذونات
9. عزل نشرات SharePoint الحرجة على أجزاء شبكة منفصلة
10. عطّل ميزات وخدمات SharePoint غير الضرورية

الكشف:
11. راقب Event Viewer لأخطاء فك التسلسل المريبة في .NET
12. تتبع تنفيذ العمليات غير المعتاد من تجمعات تطبيقات SharePoint
13. أصدر تنبيهات للاتصالات الخارجية غير المتوقعة من خوادم SharePoint
14. راجع سجلات SharePoint ULS للأخطاء والتحذيرات المتعلقة بفك التسلسل
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures A.5.2.1 - User Access Management A.5.2.2 - Privileged Access Rights A.5.2.3 - User Access Review A.5.3.1 - Password Management A.5.4.1 - Review of User Access Rights A.5.5.1 - Segregation of Duties A.6.1.1 - Cryptography Policy A.6.2.1 - Event Logging A.6.2.2 - Protection of Log Information A.6.2.3 - Administrator and Operator Logs A.6.2.4 - Clock Synchronization A.6.3.1 - Malware Detection A.6.3.2 - Malware Response Procedures A.6.4.1 - Event Monitoring A.6.4.2 - Protection of Monitoring Tools A.6.5.1 - Installation of Software on Operational Systems A.6.5.2 - Information Systems Hardening A.6.5.3 - Removal of Unnecessary Services A.6.5.4 - Segregation of Information Systems A.6.5.5 - Segregation of Networks A.6.5.6 - Segregation by Means of Firewalls A.6.5.7 - Segregation of Wireless Networks A.6.5.8 - Segregation of Mobile Devices A.6.6.1 - Network Connection Control A.6.6.2 - Network Segregation A.6.7.1 - Boundary Protection A.6.7.2 - Boundary Monitoring A.6.8.1 - Network Address Translation A.6.9.1 - Firewall Policy A.6.9.2 - Firewall Rule Management A.6.10.1 - Intrusion Detection and Prevention A.6.11.1 - Vulnerability Management A.6.11.2 - Vulnerability Scanning A.6.11.3 - Penetration Testing A.6.12.1 - Change Management A.6.12.2 - Change Impact Analysis A.6.12.3 - Change Authorization A.6.12.4 - Change Testing A.6.12.5 - Change Documentation A.6.12.6 - Change Rollback A.6.13.1 - Patch Management A.6.13.2 - Patch Testing A.6.13.3 - Patch Deployment A.6.14.1 - Incident Management A.6.14.2 - Incident Response A.6.14.3 - Incident Investigation A.6.14.4 - Incident Reporting A.6.14.5 - Incident Recovery A.6.15.1 - Business Continuity Planning A.6.15.2 - Business Continuity Testing A.6.15.3 - Business Continuity Maintenance
🔵 SAMA CSF
Governance - Risk Management Framework Governance - Incident Management Governance - Third-party Risk Management Governance - Change Management Governance - Patch Management Protective - Access Control Protective - Privileged Access Management Protective - Cryptography Protective - Data Protection Protective - Endpoint Protection Protective - Network Security Protective - Application Security Protective - Vulnerability Management Protective - Configuration Management Protective - Secure Development Protective - Supply Chain Security Protective - Physical Security Protective - Personnel Security Protective - Security Awareness Protective - Incident Response Protective - Business Continuity Protective - Disaster Recovery Detective - Monitoring and Logging Detective - Threat Intelligence Detective - Vulnerability Assessment Detective - Penetration Testing Detective - Security Testing Detective - Audit and Compliance Responsive - Incident Response Responsive - Forensics Responsive - Recovery Responsive - Communication
🟡 ISO 27001:2022
5.1 - Policies for information security 5.2 - Information security roles and responsibilities 5.3 - Segregation of duties 5.4 - Management responsibilities 5.5 - Contact with authorities 5.6 - Contact with special interest groups 5.7 - Threat intelligence 5.8 - Information security in project management 5.9 - Inventory of information and other assets 5.10 - Acceptable use of information and other assets 5.11 - Return of assets 5.12 - Classification of information 5.13 - Labelling of information 5.14 - Information transfer 5.15 - Access control 5.16 - Identity management 5.17 - Authentication information 5.18 - Access rights 5.19 - Information security in supplier relationships 5.20 - Addressing information security within supplier agreements 5.21 - Managing information security in the ICT supply chain 5.22 - Monitoring, review and change management of supplier services 5.23 - Information security for use of cloud services 6.1 - Screening 6.2 - Terms and conditions of employment 6.3 - Information security awareness, education and training 6.4 - Disciplinary process 6.5 - Responsibilities after termination or change of employment 6.6 - Confidentiality or non-disclosure agreements 6.7 - Remote working 6.8 - Information security event reporting 7.1 - Physical and environmental security perimeter 7.2 - Physical entry 7.3 - Securing offices, rooms and facilities 7.4 - Physical security monitoring 7.5 - Protecting against physical and environmental threats 7.6 - Working in secure areas 7.7 - Clear desk and clear screen 7.8 - Equipment siting and protection 7.9 - Security of assets off-premises 7.10 - Storage media 7.11 - Utility supplies 7.12 - Cabling security 7.13 - Equipment maintenance 7.14 - Secure disposal or re-use of equipment 8.1 - User endpoint devices 8.2 - Privileged access rights 8.3 - Information access restriction 8.4 - Access to cryptographic keys 8.5 - Cryptography 8.6 - Cryptographic key management 8.7 - Transmission of sensitive information 8.8 - Management of removable media 8.9 - Duplicate and backup of information 8.10 - Redundancy of information and communication facilities 8.11 - Segregation of networks 8.12 - Boundary protection 8.13 - Segregation of information networks 8.14 - Preventing unauthorized connections 8.15 - Segregation of information services 8.16 - Monitoring network activities 8.17 - Network segregation 8.18 - Filtering of information 8.19 - Installation of software on operational systems 8.20 - Information systems hardening 8.21 - Configuration management 8.22 - Information system utility programs 8.23 - Restriction of information system utility programs 8.24 - Deletion of information 8.25 - Data masking 8.26 - Preventing exfiltration of information 8.27 - Obtaining information systems 8.28 - Secure development policy 8.29 - Security requirements analysis and specification 8.30 - Information and communication technology secure development 8.31 - Separation of development, test and production environments 8.32 - Change management 8.33 - Test information 8.34 - Protection of information systems from malware 8.35 - Logging 8.36 - Monitoring system use 8.37 - Collection of evidence 8.38 - Information security event evaluation 8.39 - Response to information security incidents 8.40 - Improvement of information security incident handling 8.41 - Assessment of information security incidents 8.42 - Continuity planning 8.43 - Continuity plan implementation 8.44 - Information and other assets availability 8.45 - ICT readiness for business continuity 8.46 - Compliance evaluation 8.47 - Determination of compliance with requirements
📦 Affected Products / CPE 3 entries
microsoft:sharepoint_server
microsoft:sharepoint_server:2016
microsoft:sharepoint_server:2019
📊 CVSS Score
8.0
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.0
CWECWE-502
EPSS0.35%
Exploit No
Patch ✗ No
Published 2026-05-12
Source Feed nvd
🇸🇦 Saudi Risk Score
7.8
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-502
Share this CVE
📣 Found this valuable?
Share it with your cybersecurity network
in LinkedIn 𝕏 X / Twitter 💬 WhatsApp ✈ Telegram
🍪 Privacy Preferences
CISO Consulting — Compliant with Saudi Personal Data Protection Law (PDPL)
We use cookies and similar technologies to provide the best experience on our platform. You can choose which types you accept.
🔒
Essential Always On
Required for the website to function properly. Cannot be disabled.
📋 Sessions, CSRF tokens, authentication, language preferences
📊
Analytics
Help us understand how visitors use the site and improve performance.
📋 Page views, session duration, traffic sources, performance metrics
⚙️
Functional
Enable enhanced features like content personalization and preferences.
📋 Dark/light theme, font size, custom dashboards, saved filters
📣
Marketing
Used to deliver content and ads relevant to your interests.
📋 Campaign tracking, retargeting, social media analytics
Privacy Policy →
CISO AI Assistant
Ask anything · Documents · Support
🔐

Introduce Yourself

Enter your details to access the full assistant

Your info is private and never shared
💬
CyberAssist
Online · responds in seconds
5 / 5
🔐 Verify Your Identity

Enter your email to receive a verification code before submitting a support request.

Enter to send · / for commands 0 / 2000
CISO AI · Powered by Anthropic Claude
✦ Quick Survey Help Us Improve CISO Consulting Your feedback shapes the future of our platform — takes less than 2 minutes.
⚠ Please answer this question to continue

How would you rate your overall experience with our platform?

Rate from 1 (poor) to 5 (excellent)

🎉
Thank you!
Your response has been recorded.