CVE-2026-91366: Medium severity Oracle Siebel CRM Cloud Applications vulnerability
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).
Affected Software
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Affected supported versions are 22.3 through 26.9 of Oracle Siebel CRM Cloud Applications, specifically the Siebel Cloud Manager component. Exploitation requires access to the physical communication segment connected to the hardware running the application.
Does an attacker need an account or user interaction to exploit it?
No. The vulnerability can be exploited by an unauthenticated attacker, and no user interaction is required. Exploitation is described as difficult and requires adjacent-network access rather than general remote network access.
What could a successful attack allow?
A successful attack can provide unauthorized update, insert, or delete access to some accessible application data, along with unauthorized read access to a subset of accessible data. The stated scope change means impacts may significantly affect additional products.
What should be prioritized if an update cannot be applied immediately?
Restrict access to the physical communication segment attached to systems running the affected application. This directly addresses the required adjacent-network position for an unauthenticated attacker.