CVE-2025-42936 Overview
CVE-2025-42936 is a privilege escalation vulnerability in the SAP NetWeaver Application Server for ABAP. The flaw stems from the application's failure to enable administrators to assign distinguished authorizations for different user roles. Authenticated users can access restricted objects in the barcode interface, bypassing role-based access boundaries. The issue is categorized under [CWE-266] Incorrect Privilege Assignment. Exploitation requires low-privilege network access and no user interaction, with limited impact on confidentiality and integrity.
Critical Impact
Authenticated attackers can access restricted barcode interface objects, escalating privileges beyond their assigned role boundaries within SAP NetWeaver ABAP environments.
Affected Products
- SAP NetWeaver Application Server ABAP (SAP_BASIS) versions 700, 701, 702, 731, 740
- SAP NetWeaver Application Server ABAP (SAP_BASIS) versions 750 through 758
- SAP NetWeaver Application Server ABAP (SAP_BASIS) version 816
Discovery Timeline
- 2025-08-12 - CVE-2025-42936 published to NVD as part of SAP Security Patch Day
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-42936
Vulnerability Analysis
The vulnerability resides in the barcode interface component of the SAP NetWeaver Application Server for ABAP. SAP's authorization framework relies on administrators granting granular object-level authorizations to specific user roles. In the affected barcode interface, this role separation is not enforceable at the object level.
Authenticated users can invoke or access barcode interface objects that should be restricted to higher-privilege roles. Because the application does not distinguish authorizations between role tiers for these objects, low-privilege users gain read and modify access outside their intended scope. Availability is not affected, and no remote unauthenticated access is possible.
The issue affects a wide range of SAP_BASIS component versions across long-supported SAP NetWeaver deployments, from legacy 7.00 releases to current 8.16 stacks.
Root Cause
The root cause is an incorrect privilege assignment design in the barcode interface. The interface fails to consult distinguished authorization objects when validating access. Administrators cannot enforce role separation for the affected objects, resulting in a broken access control model consistent with [CWE-266].
Attack Vector
An attacker requires valid credentials on the target SAP NetWeaver ABAP system. Once authenticated, the attacker interacts with the barcode interface through standard SAP client protocols over the network. No user interaction is required. The attacker leverages the missing authorization check to access barcode objects assigned to other roles, achieving horizontal or vertical privilege escalation depending on the objects exposed.
See the SAP Note #3602656 for technical details from the vendor.
Detection Methods for CVE-2025-42936
Indicators of Compromise
- Unexpected access to barcode interface transactions or function modules by users outside the barcode administrator role
- SAP Security Audit Log entries showing authorization checks succeeding for users who should not hold barcode privileges
- Anomalous RFC or web service calls targeting barcode-related ABAP objects from low-privilege accounts
Detection Strategies
- Enable the SAP Security Audit Log (transaction SM19/RSAU_CONFIG) and monitor barcode-related object access
- Correlate user role assignments in PFCG against actual object access recorded in the audit log
- Baseline normal barcode interface usage and flag deviations by user identity, time, or frequency
Monitoring Recommendations
- Forward SAP Security Audit Log and change document data to a centralized SIEM for cross-user correlation
- Alert on privilege escalation patterns where a single authenticated user accesses objects tied to multiple role scopes
- Review authorization traces (ST01) periodically to identify objects accessed without an expected role grant
How to Mitigate CVE-2025-42936
Immediate Actions Required
- Apply the SAP-provided patch referenced in SAP Note #3602656 to all affected SAP_BASIS versions
- Inventory SAP NetWeaver ABAP systems and confirm SAP_BASIS release levels against the affected version list
- Audit user assignments to roles that reference barcode interface objects and remove unnecessary grants
Patch Information
SAP released the fix as part of SAP Security Patch Day. Customers should download and apply the correction instructions and support packages described in SAP Note #3602656. Additional guidance is available on the SAP Security Patch Day portal.
Workarounds
- Restrict access to the barcode interface at the network layer where feasible, limiting exposure to trusted administrative subnets
- Tighten role definitions in PFCG to remove barcode-related authorization objects from users who do not require them
- Increase Security Audit Log verbosity for barcode interface transactions until the patch is deployed
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
