CVE-2026-91366

Received Received - Intake

Unauthenticated Data Access in Siebel CRM Cloud Applications

Publication date: 2026-10-20

Last updated on: 2026-10-20

Assigner: Oracle

Description

Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager). Supported versions that are affected are 22.3-26.9. Difficult to exploit vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the Siebel CRM Cloud Applications executes to compromise Siebel CRM Cloud Applications. While the vulnerability is in Siebel CRM Cloud Applications, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Siebel CRM Cloud Applications accessible data as well as unauthorized read access to a subset of Siebel CRM Cloud Applications accessible data. CVSS 3.1 Base Score 4.7 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N).

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-20

Last Modified

2026-10-20

Generated

2026-10-21

AI Q&A

2026-10-21

EPSS Evaluated

N/A

NVD

CVE-2026-91366

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle	Corporation	Siebel CRM Cloud Applications 22.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability affects Oracle Siebel CRM Cloud Applications versions 22.3 to 26.9. It allows an unauthenticated attacker with access to the physical network segment where the application runs to compromise the system. The attacker could gain unauthorized read, update, insert, or delete access to some of the application's data.

Impact Analysis

An attacker could access, modify, or delete sensitive data stored in the Siebel CRM Cloud Applications. This could lead to data breaches, unauthorized changes to customer or business data, and potential disruptions to services relying on this application.

Compliance Impact

This vulnerability could lead to unauthorized access or modification of personal or sensitive data, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Organizations using affected versions may face legal penalties, reputational damage, and increased scrutiny from regulators.

Mitigation Strategies

Apply the latest security patches from Oracle for Siebel CRM Cloud Applications versions 22.3-26.9. Restrict physical and network access to the hardware running Siebel CRM Cloud Applications to trusted users only.

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