CVE-2026-91387

Analyzed Analyzed - Analysis Complete

Siebel CRM End User Unauthorized Data Access Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-11-04

Assigner: Oracle

Description

Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM End User. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Siebel CRM End User accessible data as well as unauthorized read access to a subset of Siebel CRM End User accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-11-04

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91387

EUVD

EUVD-2026-106641

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	siebel_crm	From 17.0 (inc) to 26.9 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Siebel CRM End User (versions 17.0-26.9) affecting the Open UI component. It allows low-privileged attackers with network access via HTTP to read or modify some data within the application. The impact includes unauthorized data access and changes, with a CVSS score of 5.4 indicating moderate severity.

Impact Analysis

If you use Oracle Siebel CRM End User versions 17.0-26.9, an attacker could exploit this to read or alter some of your accessible data without high privileges. This could lead to data leaks or corruption within the CRM system.

Compliance Impact

This vulnerability allows unauthorized read and write access to sensitive data in Siebel CRM End User, which could lead to exposure of personal or protected health information. This may violate GDPR (data confidentiality requirements) and HIPAA (protected health information safeguards) if such data is compromised.

Mitigation Strategies

Apply the latest Oracle Siebel CRM patches for versions 17.0-26.9 to address the vulnerability in the Open UI component. Ensure network access controls restrict unauthorized HTTP access to the Siebel CRM End User interface.

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EPSS Chart

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