CVE-2026-101405 in Siebel Apps
Summary
by MITRE • 10/21/2026
Vulnerability in the Siebel Apps - Marketing product of Oracle Siebel CRM (component: Marketing). Supported versions that are affected are 17.0-26.9. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Siebel Apps - Marketing. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Siebel Apps - Marketing accessible data as well as unauthorized read access to a subset of Siebel Apps - Marketing accessible data. CVSS 3.1 Base Score 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Oracle Siebel CRM Marketing component, specifically affecting supported versions ranging from 17.0 through 26.9. This security flaw is classified as a difficult-to-exploit issue that permits unauthenticated attackers to compromise the integrity and confidentiality of data accessible by the Siebel Apps - Marketing module. The attack vector requires network access via HTTPS, indicating that the vulnerability can be leveraged remotely over standard web protocols without requiring user interaction or prior authentication credentials. This characteristic significantly increases the potential risk surface as it allows for remote exploitation against systems exposed to internal or external networks where secure transport is utilized but input validation remains insufficient.
From a technical perspective, the core flaw involves inadequate access control mechanisms within the application logic handling HTTP requests directed at specific endpoints in the Marketing module. Although the interface appears secured by HTTPS and potentially other perimeter defenses, the underlying code fails to properly verify whether an unauthenticated user has sufficient privileges to perform data manipulation operations. This oversight allows malicious actors to execute unauthorized update, insert, or delete actions against certain datasets managed by the application. Furthermore, the vulnerability extends beyond mere modification capabilities, as it also grants unauthorized read access to a subset of accessible data. This dual impact on both integrity and confidentiality suggests that the flaw likely stems from missing authorization checks in API handlers or database query builders where user identity is not correctly validated before executing sensitive operations.
The operational impact of this vulnerability centers on the potential for data tampering and information disclosure within the marketing domain of the CRM system. Unauthorized updates, inserts, or deletes can lead to corruption of customer records, campaign configurations, or analytics data, thereby disrupting business processes and potentially causing financial loss or reputational damage if manipulated data is used for decision-making. Simultaneously, unauthorized read access exposes sensitive proprietary information such as client lists, marketing strategies, or performance metrics to external parties. Given the CVSS 3.1 base score of 4.8 with a vector indicating high attack complexity and no required user interaction, while maintaining low impact on availability, the primary concern lies in the erosion of trust in data accuracy and privacy. Attackers must navigate specific conditions to exploit this flaw successfully due to its difficulty rating, which may involve bypassing complex input filters or exploiting race conditions that are not trivially reproducible across all environments.
In terms of industry standard classifications, this vulnerability aligns with CWE-269 Improper Privilege Management and potentially CWE-862 Missing Authorization, as the system fails to enforce appropriate access controls for unauthenticated users. The ability to read data without authorization also maps closely to CWE-200 Exposure of Sensitive Information to an Unauthorized Actor. From a tactical standpoint within the MITRE ATT&CK framework, this behavior corresponds to techniques involving unauthorized API access and potential data exfiltration through web application vulnerabilities. Attackers leveraging this flaw would likely engage in reconnaissance followed by targeted exploitation of specific endpoints that lack proper authentication checks, aiming to extract or alter critical business data without triggering immediate detection mechanisms designed for authenticated user anomalies.
Mitigation strategies should prioritize the implementation of robust input validation and strict access control policies across all HTTP handlers within the Siebel Marketing module. Developers must ensure that every endpoint requiring sensitive operations enforces mandatory authentication and verifies that the requesting entity possesses explicit authorization rights before processing any requests. Regular security audits focusing on API endpoints are essential to identify similar gaps in privilege enforcement. Additionally, deploying a Web Application Firewall with rules tailored to detect anomalous patterns associated with unauthenticated data manipulation attempts can provide an additional layer of defense. Oracle has likely released patches addressing this specific issue; therefore, applying the latest available updates for Siebel CRM versions 17.0 through 26.9 is critical to closing these security gaps and restoring full integrity and confidentiality guarantees for marketing-related data assets.