CVE-2026-83154

Analyzed Analyzed - Analysis Complete

Siebel CRM End User Unauthenticated Data Access Vulnerability

Publication date: 2026-09-15

Last updated on: 2026-09-21

Assigner: Oracle

Description

Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI). Supported versions that are affected are 17.0-26.7. Easily exploitable vulnerability allows unauthenticated attacker with network access via SOAP to compromise Siebel CRM End User. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel CRM End User accessible data as well as unauthorized access to critical data or complete access to all Siebel CRM End User accessible data. CVSS 3.1 Base Score 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-15

Last Modified

2026-09-21

Generated

2026-10-06

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-83154

EUVD

EUVD-2026-79481

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	siebel_crm	From 17.0 (inc) to 26.7 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-287	When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
CWE-306	The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Siebel CRM End User (versions 17.0-26.7) that allows an unauthenticated attacker to remotely exploit the system via SOAP. It enables unauthorized creation, deletion, or modification of critical data, as well as unauthorized access to all accessible data in the application.

Detection Guidance

This vulnerability affects Oracle Siebel CRM End User versions 17.0-26.7 and is exploitable via SOAP over network access. Detection should focus on monitoring for unauthorized SOAP requests targeting the Siebel CRM component. Check application logs for unusual SOAP traffic patterns or requests from unexpected sources. Ensure network firewalls block unnecessary SOAP endpoints and validate that only authenticated users can access critical data endpoints.

Impact Analysis

An attacker could exploit this to steal, alter, or delete sensitive data stored in Siebel CRM. This includes customer records, financial data, or other critical business information, potentially leading to data breaches or operational disruptions.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, or other regulations due to unauthorized data access or modification. It may result in legal penalties, loss of customer trust, and reputational damage for organizations handling regulated data.

Mitigation Strategies

Apply the latest Oracle Siebel CRM patches or updates for versions 17.0-26.7 to address the SOAP-based vulnerability. Restrict network access to the Siebel CRM component via firewalls or network segmentation. Monitor logs for unusual SOAP requests or unauthorized data access attempts.

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