CVE-2026-83202 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. Easily exploitable 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 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/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 represents a critical failure in access control mechanisms that governs how unauthenticated users interact with the application server via HTTP protocols. The severity of this issue is underscored by its high exploitability characteristics, allowing an attacker to compromise the integrity and confidentiality of the system without requiring any form of authentication or user interaction. Such conditions are particularly dangerous in enterprise environments where Siebel CRM serves as a central hub for customer relationship management data, making it a prime target for malicious actors seeking to exfiltrate sensitive information or disrupt business operations through unauthorized modifications.
From a technical perspective, this vulnerability is classified under CWE-287, which denotes Improper Authentication, and aligns with the ATT&CK technique T1078, Valid Accounts, although in this specific instance, it allows access without valid credentials due to the lack of proper enforcement on certain endpoints or API calls. The flaw likely stems from a misconfiguration or code defect that fails to verify user identity before processing requests intended for administrative or data-sensitive operations. Because the attack vector is network-based and requires low complexity, an attacker can leverage standard web tools to send crafted HTTP requests directly to the vulnerable server components. This bypasses traditional perimeter defenses such as firewalls if they are not configured with deep packet inspection capabilities capable of identifying anomalous request patterns targeting unauthenticated administrative interfaces.
The operational impact of this vulnerability is severe, characterized by a CVSS 3.1 Base Score of 9.1, indicating critical risk to confidentiality and integrity while having no direct impact on availability in the base score calculation. Successful exploitation enables an attacker to perform unauthorized creation, deletion, or modification of critical data within the Siebel CRM Deployment environment. This means that sensitive customer information, including personally identifiable information (PII), financial records, and strategic business intelligence stored within the database, can be accessed by external parties without authorization. Furthermore, the ability to modify or delete data poses a significant threat to organizational integrity, potentially leading to corrupted datasets, loss of historical records, or manipulation of sales pipelines and customer interactions. The complete access to all accessible data amplifies the risk profile, as it allows for comprehensive reconnaissance and potential lateral movement within the internal network if other systems are linked via shared databases or APIs.
Mitigation strategies must focus on immediate remediation through patching and enhanced security controls. Oracle has released updates that address this specific flaw in supported versions; therefore, applying the latest cumulative patches is the primary defense mechanism. Organizations should verify their current version against the affected range of 17.0 to 26.7 and prioritize upgrades for systems exposed to untrusted networks. In addition to patching, implementing strict network segmentation is crucial to limit exposure. Siebel CRM servers should be placed in a DMZ or isolated subnet with restricted inbound traffic rules that only allow connections from authorized application tiers or management consoles. Web Application Firewalls (WAFs) can also provide an additional layer of defense by blocking requests that exhibit patterns associated with unauthenticated access attempts to administrative endpoints. Regular security audits and penetration testing should be conducted to ensure that no other similar misconfigurations exist within the deployment infrastructure, ensuring a robust posture against both known and emerging threats.