CVE-2026-83144 in Siebel Apps
Summary
by MITRE • 09/16/2026
Vulnerability in the Siebel Apps - Customer Order Management product of Oracle Siebel CRM (component: Order Management). Supported versions that are affected are 17.0-26.7. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel Apps - Customer Order Management. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Siebel Apps - Customer Order Management, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel Apps - Customer Order Management accessible data as well as unauthorized access to critical data or complete access to all Siebel Apps - Customer Order Management accessible data. CVSS 3.1 Base Score 8.7 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Order Management component of Oracle Siebel CRM, specifically affecting Customer Order Management versions ranging from 17.0 through 26.7. This security flaw represents a significant risk to organizations relying on this enterprise resource planning and customer relationship management platform for their core business operations. The nature of the defect allows an attacker with low privileges who has network access via HTTP to compromise the integrity and confidentiality of the system. While the initial point of entry is within the Order Management module, the vulnerability exhibits a scope change characteristic where successful exploitation can lead to impacts on additional products or modules beyond the immediate component, thereby expanding the blast radius of any potential breach.
From a technical perspective, the exploitability profile indicates that while the attack vector requires human interaction from a user other than the attacker, it does not demand high-level privileges for initiation. This suggests a likely cross-site scripting or similar client-side injection mechanism where an unsuspecting administrator or power user is tricked into performing an action that triggers malicious code execution within their authenticated session. The requirement for low-privileged access means that even users with standard operational roles can inadvertently facilitate the compromise, provided they interact with manipulated content delivered over HTTP. The reliance on human interaction aligns with social engineering tactics often categorized under ATT&CK techniques such as Spearphishing Attachment or Valid Accounts, where trust is abused to bypass automated defenses.
The operational impact of this vulnerability is severe, characterized by high impacts on both confidentiality and integrity while availability remains largely unaffected according to the CVSS 3.1 base score of 8.7. Successful exploitation enables unauthorized creation, deletion, or modification of critical data within Siebel Apps Customer Order Management. This capability allows an attacker to alter financial records, customer information, order statuses, or inventory levels without detection in many cases. Furthermore, it grants the ability to access all accessible data within the module, leading to a complete compromise of sensitive business intelligence and personally identifiable information stored in the system. The scope change implication means that this initial foothold could potentially be leveraged for lateral movement across other integrated Oracle products, amplifying the risk to the entire enterprise IT infrastructure.
In terms of classification standards, this vulnerability maps closely to CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-Site Scripting if it involves client-side execution, or potentially CWE-269 Improvement of Privileges if the interaction leads to elevated access rights. The ATT&CK framework would classify aspects of this attack under T1053 Scheduled Task/Job which might be used for persistence after initial compromise, and T1078 Valid Accounts for leveraging existing credentials. The high confidentiality impact underscores the need for strict data loss prevention measures, while the integrity impact highlights vulnerabilities in input validation and output encoding mechanisms within the web application layer of Siebel CRM.
Mitigation strategies must prioritize immediate patching to the latest supported version that addresses this specific flaw as outlined by Oracle Critical Patch Update advisories. In environments where patching is not immediately feasible, network segmentation should be enforced to restrict HTTP access to the Order Management component from untrusted networks. Implementing a Web Application Firewall with rules specifically tuned for detecting injection patterns and anomalous user behavior can provide an additional layer of defense. Additionally, enforcing multi-factor authentication for all administrative accounts reduces the risk associated with credential theft or session hijacking that might follow initial exploitation. Security awareness training is also critical to mitigate the human interaction vector by educating users on recognizing suspicious links or requests within the Siebel interface. Regular audits of user permissions and activity logs should be conducted to detect any unauthorized modifications or access patterns indicative of this vulnerability being exploited in real-time.