CVE-2026-91391

Analyzed Analyzed - Analysis Complete

Information Disclosure in Oracle Siebel CRM End User

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. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM End User. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Siebel CRM End User accessible data. CVSS 3.1 Base Score 3.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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-2026-91391

EUVD

EUVD-2026-106645

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-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Siebel CRM End User (component: Open UI) affecting versions 17.0-26.9. It allows an unauthenticated attacker with network access via HTTP to potentially read a subset of accessible data in the Siebel CRM system.

Detection Guidance

Detection requires monitoring for unusual HTTP traffic targeting Siebel CRM End User versions 17.0-26.9. Check server logs for unauthorized read attempts on accessible data. No specific commands are provided in the context.

Impact Analysis

An attacker could exploit this to gain unauthorized read access to some data within your Siebel CRM system, potentially exposing sensitive information like customer or business data.

Compliance Impact

This vulnerability could lead to unauthorized data access, which may violate compliance requirements under GDPR or HIPAA if sensitive personal or health data is exposed. Organizations using affected versions should assess potential compliance risks.

Mitigation Strategies

Apply Oracle's official patches for Siebel CRM End User versions 17.0-26.9. Restrict network access to HTTP ports used by Siebel CRM. Monitor for suspicious activity and update firewall rules to block unauthorized access.

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EPSS Chart

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