CVE-2026-83075 in Siebel CRM Cloud Applications
Summary
by MITRE • 09/16/2026
Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager). Supported versions that are affected are 22.3-26.7. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP 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 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 Siebel Cloud Manager component of Oracle Siebel CRM, specifically affecting supported versions ranging from 22.3 through 26.7. This security flaw represents a critical exposure in the cloud-based customer relationship management infrastructure managed by this module. The core technical deficiency allows for an unauthenticated attacker to exploit the system via standard HTTP network connections without requiring any user interaction or prior authentication credentials. This lack of access control mechanisms at the entry point effectively bypasses traditional perimeter defenses, granting external actors direct pathways into sensitive administrative and data processing layers that should remain restricted to authorized personnel only.
From a technical perspective, the vulnerability is characterized by its ease of exploitation and broad network accessibility. The absence of required authentication implies that the underlying service or endpoint associated with Siebel Cloud Manager fails to validate the identity of incoming requests before executing them or exposing internal states. This aligns closely with CWE-287, which describes Improper Authentication, where an actor is able to bypass critical security checks. Furthermore, because the attack vector is network-based and requires low complexity, it falls under ATT&CK technique T1078, Valid Accounts, although in this specific instance, no valid account is needed at all, making it a more severe variant of unauthorized access often associated with CWE-352 Cross-Site Request Forgery or CWE-614 Sensitive Cookie in Session Without Secure Flag if the flaw involves session management failures. However, given the description emphasizes complete lack of authentication for data compromise, it primarily reflects a failure in access control enforcement at the API or service level.
The operational impact of this vulnerability is severe due to its direct effect on confidentiality and potential downstream effects on integrity and availability depending on subsequent exploitation steps. A successful exploit enables an unauthenticated attacker to gain unauthorized access to critical business data stored within the Siebel CRM environment. This includes sensitive customer information, sales pipelines, contact details, and other proprietary organizational assets. The CVSS 3.1 base score of 7.5 reflects a High severity rating driven primarily by high confidentiality impact. While the vector indicates no immediate integrity or availability loss in the initial exploit phase, access to all accessible data effectively compromises the entire security posture of the application suite. Attackers could exfiltrate this information for competitive advantage, regulatory non-compliance penalties under frameworks like GDPR or HIPAA if applicable, or use it as a foothold for further lateral movement within the enterprise network.
Mitigation strategies must focus on immediate remediation and long-term architectural improvements. Oracle has likely released patches addressing these specific version ranges; therefore, applying the latest security updates to Siebel Cloud Manager is the primary corrective action. Organizations should also implement strict access controls by ensuring that all administrative interfaces are not exposed directly over HTTP without additional authentication layers such as multi-factor authentication or IP whitelisting via a Web Application Firewall. Network segmentation plays a crucial role here; restricting direct internet-facing exposure of internal management tools reduces the attack surface significantly. Additionally, regular vulnerability assessments and penetration testing should be conducted to identify similar misconfigurations in other components of the CRM stack. Monitoring logs for unusual access patterns from unauthenticated sources can also aid in early detection and response to potential exploitation attempts before significant data loss occurs.