CVE-2026-0484: SAP NetWeaver Authorization Bypass Vulnerability

CVE-2026-0484 Overview

A missing authorization check vulnerability has been identified in SAP NetWeaver Application Server ABAP and SAP S/4HANA. This security flaw allows an authenticated attacker to access a specific transaction code and modify text data within the system without proper authorization validation. The vulnerability poses a significant risk to data integrity in enterprise SAP environments.

Critical Impact

Authenticated attackers can bypass authorization controls to modify text data in SAP systems, potentially compromising the integrity of critical business information.

Affected Products

• SAP NetWeaver Application Server ABAP
• SAP S/4HANA

Discovery Timeline

• 2026-02-10 - CVE-2026-0484 published to NVD
• 2026-02-10 - Last updated in NVD database

Technical Details for CVE-2026-0484

Vulnerability Analysis

This vulnerability stems from inadequate authorization enforcement within SAP NetWeaver Application Server ABAP and SAP S/4HANA. When users attempt to access certain transaction codes, the system fails to properly validate whether the authenticated user has the necessary permissions to perform the requested actions. This missing authorization check creates a path for privilege abuse where authenticated users can access functionality beyond their intended access scope.

The vulnerability specifically impacts the integrity of the application—attackers can modify text data without proper authorization. The confidentiality and availability of the system remain unaffected, meaning sensitive data exposure and service disruptions are not direct consequences of this flaw.

Root Cause

The root cause of CVE-2026-0484 is a missing authorization check (CWE-601) in the SAP application layer. The affected transaction code does not implement proper permission validation before allowing users to modify text data. This oversight in the authorization framework allows authenticated users to perform actions that should require elevated privileges or specific role assignments within the SAP security model.

Attack Vector

The attack vector for this vulnerability is network-based and requires low privileges to exploit. An attacker must first authenticate to the SAP system—any valid user credentials would suffice. Once authenticated, the attacker can:

1. Navigate to the specific transaction code that lacks proper authorization checks
2. Access functionality that should be restricted based on their role
3. Modify text data in the system without triggering authorization failures

The exploitation requires no user interaction and can be performed with low attack complexity, making it accessible to attackers with basic SAP knowledge and valid system credentials.

Detection Methods for CVE-2026-0484

Indicators of Compromise

• Unexpected modifications to text data in SAP systems by users without appropriate authorizations
• Audit log entries showing access to restricted transaction codes by unauthorized users
• Anomalous patterns of transaction code usage that deviate from normal user behavior profiles

Detection Strategies

• Enable and review SAP Security Audit Log (SM21) for unauthorized transaction code access attempts
• Implement User and Entity Behavior Analytics (UEBA) to identify unusual data modification patterns
• Configure SAP Solution Manager to monitor for authorization violations and policy deviations
• Review authorization traces using transaction ST01 to identify missing authorization checks

Monitoring Recommendations

• Monitor SAP system logs for access attempts to the affected transaction codes
• Establish baseline user activity patterns and alert on deviations involving text data modifications
• Implement real-time alerting for high-risk transaction code usage by lower-privileged accounts
• Regularly audit user authorizations and role assignments to ensure principle of least privilege

How to Mitigate CVE-2026-0484

Immediate Actions Required

• Apply the security patch referenced in SAP Note #3672622 immediately
• Review and restrict access to the affected transaction codes pending patch deployment
• Audit recent transaction logs to identify potential exploitation attempts
• Verify that critical text data has not been tampered with by unauthorized users

Patch Information

SAP has released a security update to address this vulnerability. Organizations should obtain the patch from SAP Note #3672622 and follow the installation instructions provided. Additional details about this and other security updates can be found on the SAP Security Patch Day portal. Organizations with active SAP support agreements should prioritize the deployment of this patch as part of their regular security maintenance schedule.

Workarounds

• Implement additional authorization checks at the application layer using custom authorization objects
• Restrict access to the affected transaction codes using SAP Profile Generator (PFCG) until the patch can be applied
• Enable enhanced logging and monitoring for the affected transaction codes to detect unauthorized access
• Consider implementing SAP GRC Access Control to enforce segregation of duties and identify authorization conflicts