CVE-2026-83218 in Siebel CRM Deployment
Summary
by MITRE • 09/16/2026
Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure). Supported versions that are affected are 17.0-26.7. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Deployment. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel CRM Deployment accessible data as well as unauthorized access to critical data or complete access to all Siebel CRM Deployment accessible data. CVSS 3.1 Base Score 7.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Server Infrastructure component of Oracle Siebel CRM, specifically affecting deployment versions ranging from 17.0 through 26.7. This security flaw is classified as a high-severity issue with a CVSS 3.1 base score of 7.4, indicating significant potential for harm to organizational data integrity and confidentiality. The vulnerability stems from an architectural or implementation defect that permits unauthenticated actors to interact with the system over HTTP without requiring prior credentials. This lack of authentication requirement is particularly dangerous as it removes one of the primary layers of defense typically found in enterprise resource planning and customer relationship management systems, allowing external threats to bypass standard access controls entirely.
From a technical perspective, the flaw allows an attacker who has network access via HTTP to compromise the Siebel CRM Deployment environment. The difficulty level for exploitation is noted as difficult, which suggests that while automated tools may not easily exploit this vector without specific conditions or payloads, skilled attackers can leverage it effectively given sufficient reconnaissance and opportunity. This characteristic often points towards complex logic errors, race conditions, or improper validation mechanisms within the server infrastructure rather than simple buffer overflows or injection flaws. The attack surface is broadened by the use of HTTP, which lacks encryption, potentially allowing for man-in-the-middle attacks to further facilitate exploitation if TLS is not strictly enforced on all endpoints.
The operational impact of a successful exploit is severe and multifaceted. An attacker can achieve unauthorized creation, deletion, or modification of critical data within the Siebel CRM system. This directly impacts the integrity of business operations, as customer records, sales pipelines, and internal communications could be altered maliciously. Furthermore, the vulnerability grants unauthorized access to this critical data, leading to a complete compromise of confidentiality for all accessible information in the deployment environment. In worst-case scenarios, an attacker gains full read access to all Siebel CRM Deployment accessible data, which may include sensitive personal identifiable information (PII), financial records, and proprietary business strategies. This level of access can lead to significant regulatory compliance violations under frameworks such as GDPR or HIPAA, depending on the nature of the stored data.
In terms of industry standard classifications, this vulnerability aligns with CWE-287, which describes Improper Authentication, where an entity claims a certain identity but is not authenticated properly. Additionally, because it allows for unauthorized modification and deletion of data, it relates to CWE-613 (Insufficient Session Expiration) or CWE-94 if the access involves code injection through improper control of configuration files. From an offensive security perspective, this maps to MITRE ATT&CK techniques such as T1078 Valid Accounts if credentials are eventually harvested, but primarily T1190 Exploit Public-Facing Application due to its network accessibility and lack of initial authentication requirements. The lateral movement potential is also high once the deployment infrastructure is compromised, potentially leading to broader enterprise-wide breaches.
Mitigation strategies must prioritize immediate patching by Oracle for all affected versions within the 17.0-26.7 range. Organizations should verify their current version against this list and apply the latest security updates provided by vendor support channels. In addition to patching, network segmentation is critical; Siebel CRM deployment components should not be directly exposed to untrusted networks via HTTP. Access must be restricted through firewalls or reverse proxies that enforce strict access control lists (ACLs) limiting source IP addresses to known internal ranges only. Enforcing HTTPS with strong TLS configurations across all communication channels will also mitigate the risk associated with network-level interception and ensure data in transit is protected, although this does not fix the underlying authentication flaw it merely reduces the attack surface for remote exploitation attempts that rely on sniffing or session hijacking techniques.