CVE-2026-91431

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 logon to the infrastructure where Siebel CRM End User executes to compromise Siebel CRM End User. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Siebel CRM End User accessible data. CVSS 3.1 Base Score 5.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-2026-91431

EUVD

EUVD-2026-106681

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 (component: Open UI) affecting versions 17.0 to 26.9. It allows a low-privileged attacker with system access to exploit the flaw and gain unauthorized access to critical data or all data accessible by Siebel CRM End User.

Detection Guidance

Detection of this vulnerability requires checking for unauthorized access or unusual activity in Oracle Siebel CRM End User. Monitor logs for suspicious logins or data access patterns. Ensure all users have appropriate privileges and review access logs regularly.

Impact Analysis

An attacker could access sensitive data stored or processed by Siebel CRM End User, potentially leading to data breaches, loss of confidential information, or further exploitation within the affected infrastructure.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating compliance requirements for GDPR (data protection) and HIPAA (health information security), potentially resulting in legal penalties, fines, or reputational damage.

Mitigation Strategies

Apply the latest Oracle Siebel CRM patches or updates for versions 17.0-26.9 to address the vulnerability. Restrict user access to the infrastructure where Siebel CRM End User executes to minimize exposure. Monitor logs for unauthorized access attempts to critical data.

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