CVE-2026-91368 in Siebel CRM Cloud Applications
Summary
by MITRE • 10/21/2026
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 high privileged attacker with logon to the infrastructure where Siebel CRM Cloud Applications executes to compromise Siebel CRM Cloud Applications. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Siebel CRM Cloud Applications accessible data. CVSS 3.1 Base Score 4.1 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Siebel Cloud Manager component of Oracle Siebel CRM, specifically affecting supported versions ranging from 22.3 through 26.9. This security flaw is classified as a high-privilege insider threat scenario where an attacker must already possess significant access rights to the underlying infrastructure hosting the Siebel CRM Cloud Applications. The nature of this vulnerability indicates that it is not remotely exploitable and requires local or network-level access with elevated privileges, making it difficult for external adversaries to leverage without first compromising other parts of the system architecture.
From a technical perspective, the flaw allows an attacker who has successfully authenticated to the infrastructure where Siebel CRM Cloud Applications executes to compromise the application itself. The complexity involved in exploiting this issue suggests that specific conditions or sequences are required beyond mere authentication, such as precise timing, configuration states, or interaction with internal management interfaces controlled by the Siebel Cloud Manager. This aligns with common patterns of privilege escalation or unauthorized data access vulnerabilities where administrative tools expose sensitive backend operations to those who manage but should not necessarily view raw application data.
The operational impact of a successful exploitation is severe regarding confidentiality. An attacker can gain unauthorized access to critical business data stored within the Siebel CRM environment, potentially leading to complete exposure of all accessible customer information, sales pipelines, and internal communications. While integrity and availability impacts are listed as none in the current assessment, the loss of confidentiality alone poses significant risks including regulatory non-compliance under frameworks like GDPR or HIPAA if personal data is involved, reputational damage, and potential competitive intelligence leakage. The CVSS 3.1 base score of 4.1 reflects this limited but serious impact on confidentiality without affecting system stability or modification capabilities directly through this vector.
In terms of industry standard classifications, this vulnerability maps to CWE-200 which covers Exposure of Sensitive Information to an Unauthorized Actor. Furthermore, the attack scenario corresponds to MITRE ATT&CK techniques involving Initial Access via valid accounts and potentially Lateral Movement if the infrastructure compromise allows further traversal toward the application layer. The requirement for high privileges places it within the context of insider threats or post-exploitation activities where an attacker has already breached perimeter defenses but seeks deeper access to specific data stores managed by cloud administration tools.
Mitigation strategies should focus on strict adherence to the principle of least privilege, ensuring that individuals with administrative rights to the infrastructure do not have unnecessary direct interaction capabilities with sensitive application management functions unless explicitly required for operational tasks. Organizations must implement robust monitoring and logging mechanisms around Siebel Cloud Manager activities to detect anomalous behavior indicative of exploitation attempts. Additionally, keeping all components up to date is crucial as Oracle may release patches addressing this specific flaw in future updates. Network segmentation should also be reviewed to ensure that even if an attacker gains access to the infrastructure layer, they are isolated from direct interaction with critical application management interfaces unless authorized by strict policy controls.