CVE-2026-66777
Received Received - Intake

SAP Approuter Authorization Bypass Vulnerability

Vulnerability report for CVE-2026-66777, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-08-11

Last updated on: 2026-08-11

Assigner: SAP SE

Description

SAP Approuter does not sufficiently validate certain incoming requests before forwarding them to backend destinations. Due to the complexity of the required conditions, an attacker with low privileges could send specially crafted requests to bypass authorization checks and reach protected resources beyond their assigned scope. Successful exploitation could allow the attacker to read sensitive data and perform limited modifications on protected resources, resulting in a high impact on confidentiality and a low impact on integrity. There is no impact on availability.

CVSS Scores

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Meta Information

Published
2026-08-11
Last Modified
2026-08-11
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

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Executive Summary

SAP Approuter fails to properly validate certain incoming requests before sending them to backend systems. An attacker with low privileges could craft requests that bypass authorization checks, allowing access to protected resources beyond their intended scope. This could lead to unauthorized reading of sensitive data and limited unauthorized modifications.

Impact Analysis

If exploited, this vulnerability could allow attackers to access sensitive data they should not see and make limited unauthorized changes to protected resources. The impact is high for confidentiality and low for integrity, with no effect on system availability.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements under GDPR, HIPAA, and other regulations that mandate strict access controls and data protection measures.

Mitigation Strategies

Update SAP Approuter to the latest patched version as soon as possible to address the insufficient request validation issue. Review and restrict user permissions to minimize potential unauthorized access. Monitor network traffic for unusual requests targeting backend resources.

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