📄 Description (English)
Due to missing authorization checks in the SAP S/4HANA frontend 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-2026-27679 is a missing authorization vulnerability in SAP S/4HANA's OData Service that allows attackers to modify and delete child entities without proper access controls. With a CVSS score of 6.5, this poses a significant integrity risk to organizations using SAP systems. The absence of available patches makes immediate compensating controls critical for Saudi enterprises relying on SAP infrastructure.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: May 12, 2026 17:17
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability directly impacts Saudi banking sector (SAMA-regulated institutions), government agencies (NCA oversight), and large enterprises using SAP S/4HANA for ERP operations. ARAMCO and major energy sector organizations are particularly at risk due to heavy SAP adoption. The integrity impact could compromise financial records, supply chain data, and critical business processes. Telecom operators (STC, Mobily) and healthcare providers using SAP systems face data manipulation risks affecting billing, customer records, and operational continuity.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Energy and Utilities
Telecommunications
Healthcare
Manufacturing
Retail and E-commerce
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
7.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Audit all OData service endpoints in SAP S/4HANA environments, specifically 'Manage Reference Structures' functionality
2. Review access logs for unauthorized modification/deletion attempts on child entities
3. Implement network segmentation to restrict OData service access to authorized users only
4. Enable detailed logging and monitoring of all OData API calls
COMPENSATING CONTROLS (until patch available):
5. Deploy API gateway/WAF rules to enforce authorization checks at network layer
6. Implement role-based access control (RBAC) validation at application level
7. Restrict OData service exposure - disable public access, use VPN/private networks only
8. Apply principle of least privilege to SAP user accounts accessing OData services
DETECTION RULES:
9. Monitor for OData requests modifying/deleting entities without corresponding authorization logs
10. Alert on unusual patterns: bulk deletions, modifications outside business hours, cross-functional entity changes
11. Implement SIEM rules detecting CWE-862 patterns in SAP audit logs
12. Subscribe to SAP security advisories for patch availability and apply immediately upon release
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تدقيق جميع نقاط نهاية خدمة OData في بيئات SAP S/4HANA، خاصة وظيفة 'إدارة الهياكل المرجعية'
2. مراجعة سجلات الوصول للمحاولات غير المصرح بها لتعديل/حذف الكيانات الفرعية
3. تنفيذ تقسيم الشبكة لتقييد وصول خدمة OData للمستخدمين المصرح لهم فقط
4. تفعيل التسجيل والمراقبة التفصيلية لجميع استدعاءات OData API
الضوابط التعويضية (حتى توفر التصحيح):
5. نشر قواعد بوابة API/WAF لفرض فحوصات التفويض على مستوى الشبكة
6. تنفيذ التحقق من التحكم في الوصول القائم على الأدوار (RBAC) على مستوى التطبيق
7. تقييد تعريض خدمة OData - تعطيل الوصول العام، استخدام الشبكات الخاصة/VPN فقط
8. تطبيق مبدأ أقل امتياز على حسابات مستخدمي SAP التي تصل إلى خدمات OData
قواعد الكشف:
9. مراقبة طلبات OData التي تعدل/تحذف الكيانات دون سجلات تفويض مقابلة
10. التنبيه على الأنماط غير العادية: الحذف الجماعي، التعديلات خارج ساعات العمل، تغييرات الكيانات بين الأقسام
11. تنفيذ قواعد SIEM للكشف عن أنماط CWE-862 في سجلات تدقيق SAP
12. الاشتراك في استشارات أمان SAP وتطبيق التصحيحات فوراً عند توفرها
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.9.2.1 - User access management and authorization
ECC 2024 A.8.2.3 - Segregation of duties
ECC 2024 A.12.4.1 - Event logging and monitoring
ECC 2024 A.12.4.3 - Protection of log information
🔵 SAMA CSF
SAMA CSF ID.AC-1 - Access Control Policy
SAMA CSF PR.AC-3 - Access enforcement
SAMA CSF DE.CM-1 - System monitoring
SAMA CSF DE.AE-1 - Audit logging
🟡 ISO 27001:2022
ISO 27001:2022 A.9.2.1 - User registration and access rights
ISO 27001:2022 A.9.4.3 - Password management
ISO 27001:2022 A.8.1.1 - Information security perimeter
ISO 27001:2022 A.12.4.1 - Event logging
🟣 PCI DSS v4.0.1
PCI DSS 7.1 - Limit access to system components
PCI DSS 10.2 - Implement automated audit trails
PCI DSS 10.3 - Protect audit trail history
🔗 References & Sources 2