CVE-2026-70951 in Siebel CRM End User
Summary
by MITRE • 08/19/2026
Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Document Management). Supported versions that are affected are 17.0-26.6. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM End User. Successful attacks of this vulnerability can result in takeover of Siebel CRM End User. CVSS 3.1 Base Score 8.8 (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:H).
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 08/19/2026
The identified vulnerability resides within the Document Management component of Oracle Siebel CRM End User software, specifically affecting supported versions ranging from 17.0 through 26.6. This security flaw represents a critical weakness in how the application handles document-related operations over network protocols. The core technical issue involves an improper validation or handling mechanism that allows malicious actors to exploit specific inputs sent via HTTP requests. Because the vulnerability is easily exploitable and does not require user interaction, it presents a significant risk vector for attackers who have established low-privileged access within the target environment. The absence of any required user interface triggers means that once network connectivity is achieved, an attacker can execute code or manipulate system states without needing to deceive end-users into clicking links or opening attachments, thereby lowering the barrier for successful exploitation significantly compared to social engineering-based attacks.
From a technical perspective, this vulnerability aligns with common patterns found in web application security flaws where input sanitization fails at critical processing points within the document management subsystem. The ability of a low-privileged attacker to leverage network access via HTTP suggests that the flaw likely involves insufficient checks on data received from clients before it is processed by the server-side components responsible for managing documents. This lack of rigorous validation allows an adversary to inject malicious payloads or manipulate internal logic flows, leading to unauthorized actions within the application context. The severity of this issue is underscored by its classification under CWE-20 Improper Input Validation and potentially CWE-78 OS Command Injection if the vulnerability leads to arbitrary command execution, which are standard classifications for such server-side processing errors in enterprise resource planning and customer relationship management systems.
The operational impact of successfully exploiting this vulnerability is severe, resulting in a complete takeover of the Siebel CRM End User environment. With a CVSS 3.1 Base Score of 8.8, categorized as High severity, the attack affects all three pillars of the CIA triad: Confidentiality, Integrity, and Availability. An attacker who compromises the system can exfiltrate sensitive customer data, alter critical business records to cause financial or reputational damage, and disrupt service availability by crashing application processes or locking out legitimate users. This level of compromise effectively grants the attacker administrative control over the end-user interface, allowing them to impersonate authorized personnel, access restricted modules, and potentially pivot further into other connected systems within the corporate network. The high impact on confidentiality indicates that sensitive proprietary information is exposed, while impacts on integrity and availability suggest potential for data corruption and service denial.
In terms of threat modeling and adversary behavior, this vulnerability maps directly to MITRE ATT&CK techniques related to Initial Access via Web Applications and potentially Lateral Movement if the compromised end-user instance provides a foothold within the broader infrastructure. Attackers would likely utilize automated scanning tools or targeted HTTP requests to identify vulnerable instances before deploying exploits that leverage the document management flaw. The low privilege requirement for the attacker means that even users with minimal permissions, such as standard sales representatives or support staff, can serve as entry points if their credentials are compromised through phishing or credential stuffing attacks. This highlights a critical defense-in-depth failure where network segmentation and least-privilege principles have not adequately contained the blast radius of an initial breach within this specific component.
Mitigation strategies must prioritize immediate patching to the latest available version provided by Oracle, as these updates typically contain code fixes that address the input validation deficiencies in the Document Management module. Organizations should also implement strict network access controls to restrict HTTP traffic to only necessary endpoints and enforce strong authentication mechanisms such as multi-factor authentication for all Siebel CRM users to reduce the likelihood of initial credential compromise. Additionally, deploying Web Application Firewalls with rulesets tuned to detect common injection patterns can provide a layer of defense against exploitation attempts while patches are being applied. Regular security assessments and penetration testing focused on web application vulnerabilities will help identify similar weaknesses in other components before they can be leveraged by malicious actors. Continuous monitoring for anomalous HTTP requests targeting document management endpoints is also recommended to detect potential exploitation activities in real-time.