CVE-2026-101459 in Siebel CRM Deployment
Summary
by MITRE • 10/21/2026
Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Server Infrastructure). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows low privileged 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 and unauthorized ability to cause a partial denial of service (partial DOS) of Siebel CRM Deployment. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L).
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Server Infrastructure component of Oracle Siebel CRM Deployment versions ranging from 17.0 to 26.9, representing a significant security risk for organizations relying on this enterprise customer relationship management platform. This flaw is characterized by an easily exploitable condition that permits low-privileged attackers with network access via HTTP to compromise the integrity and availability of the deployment environment. The presence of such a vulnerability in the core infrastructure layer suggests a fundamental weakness in how the application handles requests or manages state, allowing adversaries who have already gained minimal authenticated access to escalate their privileges or manipulate critical system functions without requiring complex exploitation techniques or user interaction.
From a technical perspective, the flaw enables unauthorized creation, deletion, or modification of data that is considered critical to the operation of the Siebel CRM Deployment. This capability directly maps to CWE-798: Use of Hard-coded Credentials if authentication bypasses are involved, or more broadly to CWE-269: Improper Privilege Management and CWE-352: Cross-Site Request Forgery depending on the specific mechanism exploited via HTTP. The attacker's ability to alter critical data indicates a failure in proper authorization checks at the server level, allowing actions that should be restricted to higher-level administrators or system processes to be executed by lower-tier users. This lack of strict access control enforcement is a common pattern in legacy enterprise applications where role-based access controls may not be rigorously enforced across all API endpoints and administrative interfaces exposed over HTTP.
The operational impact of this vulnerability extends beyond mere data manipulation, as it also facilitates unauthorized access to critical data and can lead to complete access to all Siebel CRM Deployment accessible data. This represents a severe breach of confidentiality, aligning with CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. Furthermore, the vulnerability allows for the partial denial of service against the Siebel CRM Deployment, impacting availability by disrupting normal business operations. In the context of the MITRE ATT&CK framework, this behavior correlates with techniques such as T1530: Data from Cloud Storage or T1489: Service Stop if the denial-of-service involves stopping services, and potentially T1078: Valid Accounts if low-privileged credentials are used to gain initial foothold. The combination of data exfiltration capability and service disruption makes this a high-severity issue that threatens both the confidentiality and availability pillars of information security alongside integrity.
The CVSS 3.1 base score of 8.3 reflects these combined impacts, with vectors indicating network accessibility (AV:N), low attack complexity (AC:L), no user interaction required (UI:N), and unchanged scope (S:U). The high impact on confidentiality and integrity coupled with a lower but present impact on availability results in this substantial risk rating. Organizations running affected versions must recognize that the ease of exploitation means automated scanning tools or opportunistic attackers can leverage this flaw rapidly once network access is established, even if the initial attacker account has limited permissions within the application hierarchy.
Mitigation strategies should prioritize immediate patching to the latest supported version of Oracle Siebel CRM Deployment where these server infrastructure flaws have been addressed by vendor engineering teams. In environments where patching cannot be implemented immediately due to operational constraints, network segmentation is critical; administrators should restrict HTTP access to the Siebel CRM deployment interfaces to only trusted IP ranges and enforce strict firewall rules that limit exposure to public networks. Additionally, implementing Web Application Firewalls with specific rule sets designed to detect anomalous patterns associated with privilege escalation or bulk data modification attempts can provide a layer of defense in depth. Regular auditing of user permissions is also recommended to ensure that low-privileged accounts do not possess unnecessary write access to critical configuration files or database tables, thereby reducing the blast radius should such an exploitation attempt occur.