Oracle Siebel CRM Deployment up to 26.9 Server Infrastructure improper authorization

Summaryinfo

A vulnerability labeled as problematic has been found in Oracle Siebel CRM Deployment up to 26.9. This affects an unknown part of the component Server Infrastructure. The manipulation results in improper authorization. This vulnerability is known as CVE-2026-91423. Attacking locally is a requirement. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Oracle Siebel CRM Deployment up to 26.9. It has been classified as problematic. Affected is an unknown part of the component Server Infrastructure. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Siebel CRM Deployment executes 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 6.0 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N).

The advisory is shared for download at oracle.com. This vulnerability is traded as CVE-2026-91423 since 09/15/2026. The exploitability is told to be easy. The attack needs to be approached locally. The exploitation requires an enhanced level of successful authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/21/2026). The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Customer Relationship Management System

Vendor

• Oracle

Name

• Siebel CRM Deployment

Version

• 26.0
• 26.1
• 26.2
• 26.3
• 26.4
• 26.5
• 26.6
• 26.7
• 26.8
• 26.9

License

• commercial

Website

• Vendor: https://www.oracle.com

CPE 2.3info

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