CVE-2026-24326
📋 TL;DR
This vulnerability in SAP S/4HANA Defense & Security allows authenticated users with standard privileges to directly modify database tables through remote function modules due to missing authorization checks in disconnected operations. This affects integrity but not confidentiality or availability. Only SAP S/4HANA Defense & Security systems with vulnerable configurations are impacted.
💻 Affected Systems
- SAP S/4HANA Defense & Security
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An authenticated attacker could manipulate critical defense and security data, potentially altering security configurations, access controls, or operational parameters without proper authorization.
Likely Case
Privileged users could unintentionally or intentionally modify database tables they shouldn't have access to, leading to data integrity issues or configuration changes that violate security policies.
If Mitigated
With proper network segmentation and strict access controls, the impact is limited to authorized users within controlled environments making unintended modifications.
🎯 Exploit Status
Exploitation requires user-level access to SAP system and knowledge of vulnerable function modules.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check SAP Note 3678009 for specific patch versions
Vendor Advisory: https://me.sap.com/notes/3678009
Restart Required: Yes
Instructions:
1. Review SAP Note 3678009 for exact patch details. 2. Apply SAP Security Patch Day updates. 3. Restart affected SAP services. 4. Verify patch application through transaction SNOTE.
🔧 Temporary Workarounds
Restrict Function Module Access
allLimit access to vulnerable remote-enabled function modules through SAP authorization objects.
Use transaction SE93 to restrict function module execution
Configure authorization object S_RFC for specific function modules
Network Segmentation
allIsolate SAP systems from untrusted networks and restrict access to RFC interfaces.
Configure firewall rules to limit RFC port access
Implement network ACLs for SAP communication ports
🧯 If You Can't Patch
- Implement strict role-based access controls to limit which users can execute remote function modules.
- Enable detailed logging for all RFC calls and database modifications to detect unauthorized changes.
🔍 How to Verify
Check if Vulnerable:
Check if SAP Note 3678009 is applied using transaction SNOTE or review system patch level in SAP GUI.Check Version:
Use SAP transaction SM51 or SM50 to check system details and applied notes.Verify Fix Applied:
Verify SAP Note 3678009 implementation status and test that authorization checks are now enforced for affected function modules.📡 Detection & Monitoring
Log Indicators:
- Unusual RFC calls to function modules in disconnected operations
- Direct database table modifications through function modules
- Authorization failures for function module access attempts
Network Indicators:
- Unexpected RFC traffic to SAP systems
- Connection attempts to SAP RFC ports from unauthorized sources
SIEM Query:
Search for event IDs related to RFC function module execution or database table modifications in SAP audit logs.