CVE-2026-91449

Analyzed Analyzed - Analysis Complete

Siebel CRM Deployment Unauthorized Data Access Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-11-04

Assigner: Oracle

Description

Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure). 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 Deployment. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel CRM Deployment accessible data as well as unauthorized access to critical data or complete access to all Siebel CRM Deployment accessible data. CVSS 3.1 Base Score 7.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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-2026-91449

EUVD

EUVD-2026-106699

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-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 Deployment versions 17.0-26.9. It allows an unauthenticated attacker with network access via HTTP to potentially compromise the system. Successful exploitation could lead to unauthorized creation, deletion, or modification of critical data, or unauthorized access to all accessible data in Siebel CRM Deployment.

Detection Guidance

This vulnerability is specific to Oracle Siebel CRM Deployment and requires network-based detection. Monitor HTTP traffic for unusual requests targeting the Siebel CRM Deployment component. Check server logs for unauthorized data access or modification attempts. Ensure your Siebel CRM Deployment is updated to the latest version to mitigate risks.

Impact Analysis

If exploited, this vulnerability could allow attackers to modify or delete critical data, access sensitive information, or gain full control over the Siebel CRM Deployment system. This could disrupt business operations, lead to data breaches, or result in unauthorized data exposure.

Compliance Impact

This vulnerability could lead to unauthorized access or modification of sensitive data, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Organizations using affected versions may face legal penalties, reputational damage, and loss of customer trust due to potential data breaches.

Mitigation Strategies

Apply the latest Oracle Siebel CRM patches or updates for versions 17.0-26.9 to address the vulnerability. Restrict network access to the Siebel CRM Deployment component via HTTP to trusted sources only. Monitor for unauthorized data modifications or access attempts in Siebel CRM logs.

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