CVE-2026-83154 in Siebel CRM End User
Summary
by MITRE • 09/16/2026
Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI). Supported versions that are affected are 17.0-26.7. Easily exploitable vulnerability allows unauthenticated attacker with network access via SOAP to compromise Siebel CRM End User. 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 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Open UI component of Oracle Siebel CRM, specifically affecting supported versions ranging from 17.0 through 26.7. This security flaw is critical in nature and presents a significant risk to organizations relying on this enterprise customer relationship management platform for their core business operations. The vulnerability allows an unauthenticated attacker who has network access via the SOAP interface to compromise the integrity and confidentiality of the Siebel CRM End User environment. Because the attack vector requires no prior authentication, it represents a severe threat landscape where external adversaries can potentially exploit the system without needing valid credentials or user interaction.
The technical flaw centers on improper input validation or authorization checks within the SOAP API handling mechanisms of the Open UI component. This deficiency enables an attacker to send crafted requests that bypass security controls, leading to unauthorized creation, deletion, or modification of critical data stored within the Siebel CRM database. The operational impact is substantial, as successful exploitation can result in complete access to all data accessible by the Siebel CRM End User interface. This includes sensitive customer information, financial records, and proprietary business intelligence that are typically protected behind authentication layers. The ability to modify or delete this data poses a direct threat to organizational integrity and compliance with regulatory standards such as GDPR or HIPAA, depending on the industry sector.
From a classification perspective, this vulnerability aligns with CWE-287, which describes Improper Authentication, and potentially CWE-918, Server-Side Request Forgery (SSRF) if the SOAP interface is leveraged to make internal requests that bypass network boundaries. In terms of offensive security frameworks, this attack pattern corresponds to MITRE ATT&CK technique T1059, Command and Scripting Interpreter, or more specifically T1133, External Remote Services, as it involves exploiting a remote service for unauthorized access. The high severity is further underscored by the CVSS 3.1 base score of 9.1, which reflects High impacts on both Confidentiality and Integrity while maintaining Low attack complexity and no user interaction requirements. This scoring indicates that automated tools can easily discover and exploit this weakness in unpatched systems connected to a network.
Mitigation strategies must prioritize immediate patching to the latest available version provided by Oracle Siebel CRM, as vendor patches typically address these specific input validation flaws within the Open UI component. In environments where immediate patching is not feasible due to operational constraints, organizations should implement strict network segmentation to restrict SOAP interface access exclusively to trusted internal subnets or application servers. Additionally, deploying Web Application Firewalls with rules specifically designed to detect anomalous SOAP request patterns can provide a layer of defense against exploitation attempts. Regular vulnerability scanning and penetration testing focused on API endpoints are essential to identify similar misconfigurations before they can be leveraged by malicious actors. Monitoring logs for unusual data modification or access patterns originating from unauthenticated sources will also aid in early detection of potential compromise events related to this vulnerability.