CVE-2026-101408 in Siebel Apps
Summary
by MITRE • 10/21/2026
Vulnerability in the Siebel Apps - Marketing product of Oracle Siebel CRM (component: Email Marketing). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel Apps - Marketing. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Siebel Apps - Marketing, attacks may significantly impact additional products (scope change). 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 6.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Email Marketing component of Oracle Siebel CRM, specifically affecting supported versions ranging from 17.0 through 26.9. This security flaw is classified as a critical weakness in web application logic that permits unauthenticated attackers to compromise the integrity and confidentiality of data stored within the Siebel Apps - Marketing module. The vulnerability is accessible over standard HTTP protocols, indicating that it does not require secure transport layer encryption for exploitation, which significantly broadens the attack surface by allowing potential adversaries to intercept or manipulate traffic if network security controls are insufficiently configured.
From a technical perspective, this flaw represents an authorization bypass combined with improper access control mechanisms within the application's backend processing of email marketing requests. Although the vulnerability is localized to the Email Marketing component, its successful exploitation triggers a scope change in Oracle’s product impact assessment because it can lead to lateral compromise or data exfiltration that affects additional products integrated with Siebel CRM. The core technical deficiency lies in the failure to properly validate user privileges before executing database operations on marketing-related datasets. This allows an attacker who has gained network access to perform unauthorized update, insert, and delete actions against accessible data structures. Furthermore, the vulnerability also permits unauthorized read access to a specific subset of sensitive information managed by the Email Marketing system.
The operational impact of this vulnerability is substantial due to its low complexity requirements for exploitation but high potential for business disruption. While the attack vector requires human interaction from a victim other than the attacker—typically involving clicking on a malicious link or interacting with a crafted email marketing interface—the resulting consequences are severe. An adversary can manipulate critical campaign data, alter customer contact lists, delete historical engagement records, or exfiltrate personally identifiable information and proprietary marketing strategies. This dual impact on both confidentiality and integrity undermines trust in the system’s ability to protect sensitive business intelligence and customer relationships. The CVSS 3.1 base score of 6.1 reflects this balance between ease of exploitation and significant data compromise potential.
In terms of industry standard classifications, this vulnerability aligns with CWE-284 Improper Access Control and CWE-79 Cross-site Scripting if the human interaction component involves phishing or social engineering tactics facilitated by stored persistent payloads. It also maps to MITRE ATT&CK techniques related to Initial Access via Spearphishing Link (T1566.002) for the exploitation phase, followed by Data Exfiltration Over C2 Channel (T1048) and Data Manipulation (T1565) during post-exploitation activities. The requirement for human interaction suggests that while automated scanning tools might identify the presence of the flaw, actual exploitation relies on social engineering or targeted delivery mechanisms to trigger the vulnerable code path within the browser environment of an authenticated user who is then tricked into performing actions as a privileged context.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Oracle has released patches for this vulnerability which should be applied immediately to all affected instances running versions 17.0 through 26.9. In addition to patching, organizations should implement strict network segmentation to isolate the Siebel CRM environment from untrusted networks. Enforcing HTTPS across all communications is essential to prevent man-in-the-middle attacks that could facilitate the delivery of malicious payloads or intercept session tokens used in exploitation attempts. Furthermore, implementing robust Content Security Policies and input validation frameworks can help mitigate risks associated with cross-site scripting vectors often linked to such web application flaws. Regular security audits focusing on access control logic within marketing modules are recommended to ensure that privilege escalation paths remain closed against evolving threat actor techniques.