CVE-2026-83213 in Siebel CRM End User
Summary
by MITRE • 09/16/2026
Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Reports). Supported versions that are affected are 17.0-26.7. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM End User. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Siebel CRM End User 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 Reports component of Oracle Siebel CRM, specifically affecting End User versions ranging from 17.0 through 26.7. This security flaw represents a critical deficiency in access control mechanisms governing report generation and data retrieval functionalities. The core technical issue stems from insufficient authentication checks or improper authorization validation when processing HTTP requests directed at the reports module. As an unauthenticated attacker with network access to the Siebel CRM environment can exploit this weakness, it indicates that sensitive reporting endpoints do not properly verify user identity before executing queries against underlying databases. This lack of enforcement allows malicious actors to bypass standard login procedures and interact directly with report generation services, effectively treating them as public-facing interfaces rather than restricted administrative or user-specific tools.
From a technical perspective, the vulnerability aligns closely with CWE-287, which describes Improper Authentication, and potentially CWE-862, Missing Authorization, depending on whether the issue is strictly about bypassing login screens or accessing resources belonging to other users without proper permission checks. The exploitation vector relies entirely on network accessibility via HTTP, meaning that any system exposed to a network where an attacker can reach port 80 or associated web service ports is at risk. Since no user interaction such as clicking a link (UI:N) or low complexity of attack (AC:L) is required, the barrier for entry is exceptionally low. An adversary could automate requests using standard scripting tools like curl or Python libraries to enumerate available reports and extract data without ever establishing a legitimate session within the application.
The operational impact of this vulnerability is severe due to its high confidentiality rating in the CVSS 3.1 scoring model, which assigns a base score of 7.5 out of 10. Successful exploitation grants unauthorized access to critical business data stored within Siebel CRM, including customer records, sales pipelines, financial summaries, and operational metrics. In worst-case scenarios, an attacker could achieve complete access to all data accessible by the application itself, leading to significant intellectual property theft or regulatory compliance violations under frameworks such as GDPR or HIPAA if personal health information is involved. While integrity and availability impacts are currently rated as none in this specific vector, the exposure of confidential data alone poses substantial reputational and financial risks to organizations relying on Siebel for customer relationship management operations.
In terms of threat modeling, this vulnerability maps directly to MITRE ATT&CK technique T1078, Valid Accounts, specifically when considering how attackers might leverage stolen credentials or bypass authentication entirely to maintain persistence, although in this unauthenticated case it more closely resembles initial access techniques like T1190 Exploit Public-Facing Application. The ability to extract data without detection also facilitates reconnaissance activities described under T1005 Data from Local System, allowing adversaries to gather intelligence for further lateral movement or social engineering attacks against other employees within the organization.
To mitigate this risk, immediate action is required to apply vendor-provided security patches that address the authentication logic in the Reports component. Organizations should ensure their Oracle Siebel CRM instances are updated to versions beyond 26.7 where these flaws have been remediated. In environments where patching cannot be implemented immediately due to operational constraints, network-level controls such as Web Application Firewalls (WAF) can be configured to block suspicious patterns associated with unauthenticated report queries. Additionally, restricting direct HTTP access to the Siebel CRM interface by enforcing HTTPS and implementing strict IP whitelisting for administrative or sensitive modules can reduce the attack surface. Regular vulnerability scanning and penetration testing focused on authentication bypasses are recommended to detect similar misconfigurations across other components of the enterprise application suite.