CVE-2026-0484 in NetWeaver Application Server ABAP and S-4HANA
Summary
by MITRE • 02/10/2026
Due to missing authorization check in SAP NetWeaver Application Server ABAP and SAP S/4HANA, an authenticated attacker could access a specific transaction code and modify the text data in the system. This vulnerability has a high impact on integrity of the application with no effect on the confidentiality and availability.
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Analysis
by VulDB Data Team • 02/18/2026
The vulnerability identified as CVE-2026-0484 represents a critical authorization flaw within SAP NetWeaver Application Server ABAP and SAP S/4HANA platforms that fundamentally compromises data integrity. This weakness stems from insufficient access controls that fail to properly validate user permissions before allowing execution of specific transaction codes. The vulnerability exists in the authorization framework where the system does not adequately verify whether authenticated users possess the necessary privileges to modify text data within the application environment. Attackers exploiting this flaw can leverage their existing authentication credentials to gain unauthorized access to transaction codes that should be restricted to privileged users only, thereby enabling them to manipulate textual information stored within the system.
The technical implementation of this vulnerability aligns with CWE-285, which addresses insufficient authorization checks in software systems, and demonstrates how weak access control mechanisms can lead to privilege escalation scenarios. The flaw specifically affects the authorization validation process within SAP's transaction handling architecture, where the system fails to perform proper entitlement checks before permitting modifications to text data elements. This represents a classic case of inadequate input validation and access control enforcement that allows authenticated users to bypass intended security boundaries. The vulnerability's impact is particularly severe as it directly targets the integrity aspect of the CIA triad, enabling attackers to modify critical textual information while maintaining the confidentiality and availability of the system remains unaffected.
From an operational perspective, this vulnerability poses significant risks to organizations relying on SAP systems for business-critical operations, as it enables unauthorized modification of text data that may include configuration parameters, documentation, or business-related textual content. The attack surface is particularly concerning because it requires only authentication credentials, making it accessible to both internal threat actors and external attackers who have gained legitimate access to the system. The modification capabilities extend to text data elements that could influence system behavior, user interfaces, or business process documentation, potentially leading to operational disruptions or misleading information being presented to authorized users. This vulnerability also creates opportunities for attackers to establish persistence or hide malicious activities through text-based modifications that may not immediately trigger system alerts.
Organizations should implement immediate mitigations including thorough review and strengthening of authorization policies within their SAP environments, ensuring that transaction code access controls are properly enforced and regularly audited. The recommended approach involves implementing comprehensive access control reviews, enabling detailed logging of transaction code executions, and establishing automated monitoring for unauthorized modifications to text data elements. Security teams should also consider implementing SAP-specific security tools and solutions that can detect and prevent unauthorized access attempts to restricted transaction codes. The vulnerability's classification as high-impact for integrity aligns with ATT&CK technique T1078 which addresses valid accounts and privilege escalation, making it essential for organizations to maintain strict access control measures and conduct regular security assessments of their SAP implementations to prevent exploitation of such authorization flaws.