CVE-2026-120017
Received Received - Intake

Authentication Bypass in SAP NetWeaver AS ABAP

Publication date: 2026-11-10

Last updated on: 2026-11-10

Assigner: SAP SE

Description
SAP NetWeaver AS ABAP and ABAP Platform does not perform sufficient verification of incoming authentication assertions under certain configurations. An unauthenticated attacker could submit specially crafted data to bypass authentication and impersonate arbitrary users, including privileged accounts. Successful exploitation could cause a full system compromise, with the impact potentially extending to connected components and systems beyond the affected system. This results in a high impact on confidentiality, integrity, and availability of the application.

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Meta Information

Published
2026-11-10
Last Modified
2026-11-10
Generated
2026-11-10
AI Q&A
2026-11-10
EPSS Evaluated
N/A
NVD
CVE-2026-120017
EUVD
EUVD-2026-120700

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
sap netweaver_as_abap *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-347 The product does not verify, or incorrectly verifies, the cryptographic signature for data.

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Executive Summary

SAP NetWeaver AS ABAP and ABAP Platform has a flaw where it does not properly verify authentication assertions in certain setups. This allows an unauthenticated attacker to send specially crafted data to bypass authentication and impersonate any user, including administrators. If exploited, it could lead to a complete system takeover and potentially affect other connected systems.

Detection Guidance

Detecting this vulnerability requires checking SAP NetWeaver AS ABAP and ABAP Platform configurations for improper authentication assertion verification. Review SAP system logs for unusual authentication attempts or failed logins. Inspect network traffic for suspicious data submissions to authentication endpoints. SAP provides diagnostic tools like transaction codes ST01 (Security Audit Log) and SM19/SM20 (Security Audit Analysis) to monitor authentication events. Check SAP notes for patches or configuration changes.

Impact Analysis

This vulnerability could allow attackers to gain unauthorized access to your SAP system, steal sensitive data, modify or delete critical information, and disrupt operations. Privileged accounts being compromised could lead to further attacks on connected systems or data breaches.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, and other regulations due to unauthorized data access, breaches of confidentiality, or integrity violations. Organizations may face legal penalties, fines, or reputational damage if exploited.

Mitigation Strategies

Apply SAP Security Note 3849308 immediately to patch the authentication verification flaw in SAP NetWeaver AS ABAP and ABAP Platform.

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