CVE-2026-83078 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 as well as unauthorized update, insert or delete access to some of Siebel CRM Cloud Applications accessible data. CVSS 3.1 Base Score 8.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/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 weakness in the authentication and access control mechanisms governing the cloud management interface. The core technical issue allows an unauthenticated attacker to exploit the system via standard HTTP network connections without requiring any user interaction or prior credentials. This lack of required authentication is particularly severe as it removes one of the primary layers of defense, allowing remote adversaries to interact directly with sensitive administrative functions exposed by the application layer.
From a technical perspective, this vulnerability aligns closely with CWE-287, which describes Improper Authentication, and potentially CWE-306 for Missing Authentication for Critical Function. The attacker leverages network access over HTTP to bypass security controls that should restrict entry to authorized personnel only. By exploiting the flawed logic in how requests are validated by Siebel Cloud Manager, an adversary can execute commands or query data structures without being identified or verified by the system. This indicates a failure in implementing robust identity verification processes for critical management endpoints, allowing direct manipulation of the application state through unauthenticated API calls or web interactions.
The operational impact of this vulnerability is substantial due to its high severity rating and broad scope of access. With a CVSS 3.1 Base Score of 8.2, classified as High Severity, the risk to organizational data integrity and confidentiality is significant. Successful exploitation enables an attacker to gain unauthorized access to critical business data stored within the Siebel CRM environment. Furthermore, the vulnerability grants complete access to all accessible data within the application suite, effectively compromising the entire information asset base managed by the system. Beyond mere observation, the attacker possesses the capability to perform unauthorized updates, insertions, and deletions of data. This level of write-access means that an adversary can not only steal sensitive customer or operational records but also corrupt them, leading to potential business disruption, financial loss, and reputational damage for the organization relying on these CRM services.
In terms of threat modeling and industry frameworks, this vulnerability maps directly to MITRE ATT&CK technique T1078, Valid Accounts, although in this specific case, it represents a bypass where no valid account is needed initially, effectively granting administrative-level privileges without credentials. It also relates to T1530, Data from Cloud Storage Object, as the attacker extracts data from cloud-hosted applications. The combination of high confidentiality impact and moderate integrity impact suggests that attackers could engage in both espionage and sabotage activities. The ability to delete or modify records poses a direct threat to business continuity and regulatory compliance, particularly for organizations subject to strict data protection laws such as GDPR or HIPAA, where unauthorized modification or exposure of personal identifiable information constitutes a severe breach.
Mitigation strategies must prioritize immediate remediation through vendor-provided patches. Organizations running affected versions between 22.3 and 26.7 should apply the latest security updates released by Oracle to address this specific flaw in Siebel Cloud Manager. Until patching is feasible, network-level controls are essential for risk reduction. Implementing strict firewall rules to restrict access to the Siebel CRM management interfaces exclusively from trusted IP addresses can significantly reduce the attack surface. Additionally, enforcing HTTPS with strong certificate validation and ensuring that all administrative endpoints require multi-factor authentication where possible adds necessary layers of defense. Regular vulnerability scanning and penetration testing should be conducted to identify any other misconfigurations or unpatched components within the Siebel ecosystem, ensuring a comprehensive security posture against similar exploitation attempts.