Oracle Siebel CRM End User up to 26.6 Open UI improper authorization

Summaryinfo

A vulnerability identified as critical has been detected in Oracle Siebel CRM End User up to 26.6. This impacts an unknown function of the component Open UI. This manipulation causes improper authorization. This vulnerability appears as CVE-2026-70857. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability has been found in Oracle Siebel CRM End User up to 26.6 and classified as critical. Affected by this vulnerability is some unknown functionality of the component Open UI. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI). Supported versions that are affected are 17.0-26.6. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTPS to compromise Siebel CRM End User. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Siebel CRM End User, attacks may significantly impact additional products (scope change). 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 7.7 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N).

It is possible to read the advisory at oracle.com. This vulnerability is known as CVE-2026-70857 since 08/05/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/19/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Customer Relationship Management System

Vendor

• Oracle

Name

• Siebel CRM End User

Version

• 26.0
• 26.1
• 26.2
• 26.3
• 26.4
• 26.5
• 26.6

License

• commercial

Website

• Vendor: https://www.oracle.com

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