CVE-2026-83227 in Siebel CRM Integration
Summary
by MITRE • 09/16/2026
Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: EAI). Supported versions that are affected are 17.0-26.7. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM Integration. Successful attacks of this vulnerability can result in takeover of Siebel CRM Integration. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Enterprise Application Integration component of Oracle Siebel CRM, specifically affecting versions ranging from 17.0 through 26.7. This security flaw represents a critical risk to organizations relying on this platform for customer relationship management and data integration workflows. The core technical issue involves an authentication bypass or improper access control mechanism that allows unauthorized entities to interact with sensitive system functions. Although the vulnerability is classified as difficult to exploit, requiring high complexity in terms of attack vectors, it does not necessitate user interaction and can be triggered remotely over HTTP by a low-privileged attacker who has network connectivity to the affected service. This combination of remote accessibility and low privilege requirements significantly elevates the threat landscape for enterprises that expose these integration endpoints to internal or external networks without sufficient segmentation or additional security controls.
The operational impact of this vulnerability is severe, as successful exploitation leads to complete takeover of the Siebel CRM Integration component. The CVSS 3.1 base score of 7.5 reflects high impacts across confidentiality, integrity, and availability. An attacker gaining control over this integration layer can potentially exfiltrate sensitive customer data, alter critical business records, or disrupt operational continuity by disabling essential services. This level of compromise undermines the trustworthiness of the entire CRM ecosystem, as the integration component often serves as a bridge between Siebel and other backend systems such as ERP databases, marketing automation tools, and third-party APIs. Consequently, the breach can cascade into broader organizational data leaks or financial fraud if the integrated systems handle sensitive transactions or personal identifiable information.
From a classification perspective, this vulnerability aligns with CWE-287 Improper Authentication and CWE-915 Improvement of Privileges using Incorrectly Controlled Security Descriptor for Uncommon Component or API. The remote nature of the attack vector places it within MITRE ATT&CK technique T1071 Application Layer Protocol, specifically HTTP/HTTPS traffic manipulation. Attackers may leverage this flaw to inject malicious payloads or execute arbitrary commands through the integration interface, effectively bypassing standard authentication checks due to the high complexity requirement being manageable for determined adversaries with specific network positioning. The lack of user interaction further simplifies automated exploitation scripts, increasing the likelihood of widespread compromise in environments where patch management is delayed.
Mitigation strategies must prioritize immediate remediation through vendor-provided patches or updates that address the underlying code flaws within the EAI component. Organizations should implement strict network segmentation to restrict HTTP access to the Siebel CRM Integration endpoints only from trusted internal subnets, thereby reducing the attack surface for external adversaries. Additionally, deploying Web Application Firewalls with rules specifically tuned to detect anomalous HTTP requests targeting integration APIs can provide a layer of defense in depth. It is also advisable to enforce multi-factor authentication and role-based access controls at the network perimeter level to ensure that even if an attacker bypasses application-level checks, they face additional barriers before achieving system takeover. Regular vulnerability scanning and penetration testing focused on integration points are essential to identify similar misconfigurations or unpatched weaknesses across the enterprise architecture.