CVE-2026-70856 in Siebel CRM Deployment
Summary
by MITRE • 08/19/2026
Vulnerability in the Siebel CRM Deployment product of Oracle Siebel CRM (component: Migration). Supported versions that are affected are 17.0-26.6. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel CRM Deployment. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Siebel CRM Deployment. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 08/19/2026
The identified vulnerability resides within the Migration component of Oracle Siebel CRM Deployment, specifically affecting supported versions ranging from 17.0 through 26.6. This security flaw represents a critical risk to enterprise customer relationship management infrastructure, as it allows for unauthorized access and potential system compromise without requiring prior authentication credentials. The nature of this vulnerability is characterized by its reliance on network-based exploitation vectors via the HTTP protocol, which means that an attacker can initiate attacks remotely over standard web connections rather than through local physical or authenticated session interactions. Despite being classified as difficult to exploit due to high complexity requirements and the necessity for human interaction, the severity rating remains significant because a successful compromise leads to complete system takeover.
From a technical perspective, this vulnerability aligns with CWE-79, which describes Cross-Site Scripting (XSS) or similar injection flaws where user input is not properly sanitized before being processed by the application logic in the migration module. The requirement for human interaction suggests that the attack vector likely involves social engineering tactics, such as tricking an administrator into clicking a malicious link or uploading a crafted file during a deployment process. This aligns with ATT&CK technique T1566.002, which covers Spearphishing Link attacks where users are lured to click on links that lead to exploit kits or malicious payloads designed to leverage the specific flaw in the migration engine. The difficulty of exploitation stems from the need for precise timing and contextual manipulation, but once triggered, it bypasses standard authentication controls entirely.
The operational impact of this vulnerability is severe, as indicated by a CVSS 3.1 Base Score of 7.5, which denotes high severity. The vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H) confirms that the attack has Network accessibility and requires no Privileges for initiation but does require User Interaction. Crucially, it results in High impacts across Confidentiality, Integrity, and Availability. A successful exploitation allows an unauthenticated attacker to gain full control over the Siebel CRM Deployment environment. This means attackers can exfiltrate sensitive customer data, alter business-critical records, or disrupt service availability by manipulating deployment configurations or injecting malicious code into migration scripts that are executed with elevated privileges within the application context.
Mitigation strategies must focus on both immediate technical controls and long-term architectural improvements. Organizations should immediately apply available security patches from Oracle to update the Siebel CRM Deployment software to a version where this vulnerability is resolved. In environments where patching cannot be performed instantly, network segmentation policies should restrict HTTP access to the migration interface to trusted internal IP ranges only, effectively reducing the attack surface for remote attackers. Additionally, implementing strict input validation and output encoding on all user-supplied data within the migration module can help prevent exploitation of injection-based flaws. Security awareness training is also essential to mitigate the human interaction requirement, ensuring that administrators do not interact with suspicious links or unverified deployment packages from external sources. Regular vulnerability scanning focused on web application components will further aid in detecting any attempts to exploit this specific weakness before it leads to a full system compromise.