CVE-2026-83326 in Siebel CRM Integration
Summary
by MITRE • 09/16/2026
Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: Open Integration). Supported versions that are affected are 25.12-26.7. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Integration. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Siebel CRM Integration accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Open Integration component of Oracle Siebel CRM, specifically affecting supported versions ranging from 25.12 through 26.7. This security flaw represents a critical weakness in the authentication and access control mechanisms governing how external systems interact with the core customer relationship management platform via HTTP protocols. The nature of this vulnerability allows for exploitation by an unauthenticated attacker who possesses network-level connectivity to the affected service endpoints. Because no valid credentials or user interaction are required to initiate the attack, the barrier to entry is significantly lowered, enabling remote adversaries to target the system from any location on the internet where the vulnerable endpoint is reachable. This characteristic aligns with common patterns of insecure direct object references or broken access control flaws often found in enterprise integration layers that expose internal APIs without sufficient validation of caller identity.
From a technical perspective, the flaw likely stems from insufficient verification of user privileges when processing incoming HTTP requests directed at specific integration endpoints. In many such scenarios, the application fails to properly enforce authorization checks before executing operations or retrieving data associated with sensitive business entities. An attacker can craft malicious HTTP payloads that bypass standard authentication gates, effectively tricking the server into treating an anonymous request as if it originated from a privileged user account. This misconfiguration allows the adversary to traverse internal data structures and extract information that should be strictly confined to authorized personnel. The absence of proper session management or token validation in these specific integration paths creates a direct pathway for unauthorized data retrieval, exploiting the trust relationship between the Siebel CRM system and its integrated partners without requiring any prior compromise of user credentials.
The operational impact of this vulnerability is severe due to the high confidentiality impact indicated by the CVSS 3.1 base score of 7.5. Successful exploitation grants an attacker complete access to all data accessible through the Siebel CRM Integration interface, which typically includes highly sensitive customer information such as personal identifiers, contact details, sales histories, and potentially financial records. This level of unauthorized access can lead to significant regulatory compliance violations under frameworks like GDPR or HIPAA if protected health information is exposed. Furthermore, the exposure of critical business data undermines competitive advantage and erodes customer trust. While the current assessment indicates no immediate impact on integrity or availability, the ability to exfiltrate vast amounts of confidential data poses a substantial risk to organizational reputation and legal standing. The attack vector falls squarely under CWE-287 Improper Authentication and CWE-862 Missing Authorization in standard vulnerability classification taxonomies, highlighting fundamental failures in identity verification and permission enforcement within the application logic.
To mitigate this risk, organizations running affected versions of Oracle Siebel CRM must immediately apply the latest security patches provided by Oracle to address the authentication bypass flaw. Until patching is feasible, network-level controls should be implemented to restrict access to the vulnerable HTTP endpoints exclusively from trusted IP addresses or internal networks using firewalls and web application firewalls. Additionally, implementing strict rate limiting and monitoring for anomalous request patterns can help detect potential exploitation attempts in real-time. It is also advisable to review API gateway configurations to ensure that all integration points enforce robust authentication protocols such as OAuth 2.0 or mutual TLS before processing any requests. Regular security assessments focused on access control logic are recommended to identify similar weaknesses across other integrated services within the enterprise architecture, ensuring a comprehensive defense against unauthorized data exposure attacks classified under MITRE ATT&CK technique T1530 Data from Cloud Storage Objects if applicable, though primarily this maps to T1078 Valid Accounts when considering how unauthenticated access mimics valid privileged sessions.