CVE-2026-24326 identifies a missing authorization check vulnerability (CWE-862) in the Disconnected Operations component of SAP S/4HANA Defense & Security. This flaw allows an attacker who already has user-level privileges within the SAP environment to call remote-enabled function modules that perform direct updates on standard SAP database tables without undergoing proper authorization validation. The vulnerability affects a wide range of SAP S/4HANA Defense & Security versions, from EA-DFPS 600 through 809, indicating a long-standing issue across multiple releases. The core technical issue is that the system fails to enforce authorization checks before allowing remote function calls to modify critical database records, which can lead to unauthorized data manipulation. The CVSS v3.1 base score is 4.3 (medium), reflecting that the attack vector is network-based (AV:N), requires low attack complexity (AC:L), needs privileges (PR:L), and does not require user interaction (UI:N). The impact is limited to integrity (I:L) with no confidentiality (C:N) or availability (A:N) impact. No public exploits have been reported yet, but the vulnerability could be leveraged by insiders or attackers who have compromised user credentials. The missing authorization check could allow unauthorized changes to defense and security-related data, potentially affecting operational decisions or compliance. The vulnerability is particularly relevant for organizations using SAP S/4HANA Defense & Security modules in disconnected or remote operational contexts, where function modules are exposed for remote invocation.

For European organizations, especially those in defense, government, and critical infrastructure sectors relying on SAP S/4HANA Defense & Security, this vulnerability poses a risk to data integrity. Unauthorized modifications to SAP database tables could lead to incorrect or manipulated security configurations, audit logs, or operational data, potentially undermining security postures or compliance with regulatory requirements such as GDPR or NIS Directive. Although confidentiality and availability are not impacted, integrity breaches in defense-related systems can have serious operational consequences. The requirement for user privileges limits the attack surface to insiders or compromised accounts, but given the sensitivity of defense data, even low-integrity impacts can have outsized effects. European organizations with extensive SAP deployments must consider the risk of insider threats or lateral movement by attackers who have gained user-level access. The lack of known exploits reduces immediate urgency but does not eliminate the risk of future exploitation. The broad range of affected versions means many organizations may be vulnerable if not updated. The impact is thus moderate but significant in high-security environments.

1. Immediately review and tighten role-based access controls (RBAC) within SAP S/4HANA Defense & Security to ensure users have the minimum necessary privileges, especially for remote-enabled function modules. 2. Monitor SAP system logs and database change records for unusual or unauthorized direct updates to standard tables, implementing alerting mechanisms for suspicious activity. 3. Apply SAP vendor patches or security notes addressing CVE-2026-24326 as soon as they become available; maintain close communication with SAP support channels for updates. 4. Conduct regular audits of user privileges and remote function call usage to detect potential misuse or privilege escalation attempts. 5. Implement network segmentation and restrict access to SAP systems to trusted hosts and users, reducing exposure to network-based attacks. 6. Employ multi-factor authentication (MFA) for SAP user accounts to reduce the risk of credential compromise. 7. Educate SAP administrators and security teams about this vulnerability and the importance of authorization checks in SAP modules. 8. Consider deploying SAP-specific security tools that can detect anomalous function module invocations or unauthorized database modifications. These targeted measures go beyond generic patching and help reduce the risk of exploitation in complex SAP environments.