📄 Description (English)
Due to missing authorization checks in the SAP S/4HANA backend OData Service (Manage Reference Structures), an attacker could update and delete child entities via exposed OData services without proper authorization. This vulnerability has a high impact on integrity, while confidentiality and availability are not impacted.
🤖 AI Executive Summary
CVE-2026-27678 is a missing authorization vulnerability in SAP S/4HANA's OData Service for managing reference structures, allowing unauthorized modification and deletion of child entities. With a CVSS score of 6.5 and no available patch, this poses an immediate integrity risk to organizations relying on SAP systems for critical business processes. The vulnerability is particularly concerning for Saudi enterprises using S/4HANA for ERP operations, as it could enable unauthorized data manipulation without detection.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 12, 2026 17:19
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), and large enterprises using SAP S/4HANA for financial and operational data management. Saudi Aramco, telecommunications providers (STC, Mobily), and healthcare organizations managing patient records through S/4HANA are particularly vulnerable. The integrity impact could lead to unauthorized modification of master data, financial records, and reference structures critical to business operations. Given the widespread adoption of SAP in Saudi Arabia's critical infrastructure, this vulnerability could affect supply chain integrity, financial reporting accuracy, and regulatory compliance.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Sector
Energy and Utilities
Healthcare
Telecommunications
Manufacturing
Retail and E-commerce
Logistics and Supply Chain
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.2
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all SAP S/4HANA instances and OData services in your environment, particularly those exposing Manage Reference Structures functionality
2. Review access logs for the past 90 days to identify suspicious OData service calls (POST/PUT/DELETE operations on child entities)
3. Implement network-level restrictions to limit OData service access to authorized users and systems only
4. Enable detailed audit logging for all OData service modifications
Compensating Controls (until patch available):
5. Restrict OData service endpoints at the firewall/WAF level to known trusted IP ranges
6. Implement API gateway authentication requiring multi-factor authentication for OData service access
7. Apply role-based access controls (RBAC) at the application level to restrict entity modification permissions
8. Deploy Web Application Firewall (WAF) rules to detect and block unauthorized OData CRUD operations
9. Implement data integrity monitoring to detect unauthorized changes to reference structures
Detection Rules:
10. Monitor for OData requests to /sap/opu/odata/sap/C_MANAGEREFERENCESTRUCTURES_SRV with PUT/DELETE methods from unexpected sources
11. Alert on failed authorization attempts followed by successful modifications
12. Track changes to reference structure child entities outside normal business hours
13. Monitor for bulk delete operations on reference structure entities
Patching Strategy:
14. Subscribe to SAP Security Patch Day notifications and apply patches immediately upon availability
15. Test patches in non-production environments before production deployment
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. قم بحصر جميع مثيلات SAP S/4HANA وخدمات OData في بيئتك، خاصة تلك التي تعرض وظيفة إدارة الهياكل المرجعية
2. راجع سجلات الوصول لآخر 90 يوماً لتحديد استدعاءات خدمة OData المريبة (عمليات POST/PUT/DELETE على الكيانات الفرعية)
3. طبق قيوداً على مستوى الشبكة لتحديد وصول خدمة OData للمستخدمين والأنظمة المصرح لهم فقط
4. فعّل تسجيل التدقيق التفصيلي لجميع تعديلات خدمة OData
الضوابط البديلة (حتى توفر التصحيح):
5. قيّد نقاط نهاية خدمة OData على مستوى جدار الحماية/WAF لنطاقات IP موثوقة معروفة
6. طبق مصادقة بوابة API تتطلب المصادقة متعددة العوامل لوصول خدمة OData
7. طبق التحكم في الوصول القائم على الأدوار (RBAC) على مستوى التطبيق لتقييد أذونات تعديل الكيانات
8. نشّر قواعد جدار تطبيقات الويب (WAF) للكشف عن عمليات OData CRUD غير المصرح بها وحجبها
9. طبق مراقبة سلامة البيانات للكشف عن التغييرات غير المصرح بها على الهياكل المرجعية
قواعد الكشف:
10. راقب طلبات OData إلى /sap/opu/odata/sap/C_MANAGEREFERENCESTRUCTURES_SRV بطرق PUT/DELETE من مصادر غير متوقعة
11. أصدر تنبيهات عند محاولات فشل التفويض متبوعة بتعديلات ناجحة
12. تتبع التغييرات على كيانات الهياكل المرجعية الفرعية خارج ساعات العمل العادية
13. راقب عمليات الحذف الجماعي على كيانات الهياكل المرجعية
استراتيجية التصحيح:
14. اشترك في إشعارات SAP Security Patch Day وطبق التصحيحات فوراً عند توفرها
15. اختبر التصحيحات في بيئات غير الإنتاج قبل نشرها في الإنتاج
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1.1 - Access Control and Authorization
5.2.1 - User Access Management
5.3.1 - Privileged Access Management
6.1.1 - Audit Logging and Monitoring
6.2.1 - Data Integrity and Validation
🔵 SAMA CSF
Governance & Risk Management - Authorization and Access Control
Information Security - Data Integrity and Confidentiality
Operational Resilience - Monitoring and Detection
Third-Party Risk Management - SAP System Controls
🟡 ISO 27001:2022
A.5.2 - Information Security Policies and Procedures
A.6.1 - Internal Organization
A.8.1 - Asset Management
A.9.1 - Access Control
A.9.2 - User Access Management
A.9.4 - Access Control to Information and Other Associated Assets
A.10.1 - Cryptography
A.12.4 - Logging
A.12.6 - Management of Technical Vulnerabilities
🟣 PCI DSS v4.0.1
Requirement 1 - Firewall Configuration
Requirement 2 - Default Passwords and Security Parameters
Requirement 6 - Secure Development and Vulnerability Management
Requirement 7 - Restrict Access to Data by Business Need
Requirement 8 - User Identification and Authentication
Requirement 10 - Logging and Monitoring
🔗 References & Sources 2