CVE-2026-83153 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 low privileged attacker with network access via HTTPS to compromise Siebel CRM Deployment. Successful attacks of this vulnerability can result in takeover of Siebel CRM Deployment. 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).
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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 Deployment versions ranging from 17.0 to 26.7, representing a critical security flaw that undermines the integrity and confidentiality of enterprise customer relationship management systems. This specific weakness is characterized by its ease of exploitation, allowing an attacker with low privileges and network access via HTTPS to successfully compromise the underlying deployment environment. The severity of this issue is quantified by a CVSS 3.1 Base Score of 8.8, indicating a High risk level that demands immediate attention from system administrators and security operations teams responsible for maintaining these platforms.
From a technical perspective, the vulnerability enables an unauthenticated or low-privileged remote attacker to execute arbitrary code or escalate privileges within the Siebel CRM Deployment architecture. The attack vector is network-based (AV:N) with low complexity (AC:L), meaning that sophisticated exploit development skills are not required to leverage this flaw. Crucially, the requirement for user interaction is absent (UI:N), and while the privilege level needed is low (PR:L), the scope of impact remains unchanged (S:U). This configuration allows an attacker who has gained initial foothold or network access within a trusted segment to directly target the server infrastructure without needing complex social engineering or physical proximity.
The operational impact of this vulnerability is severe, as successful exploitation leads to complete takeover of the Siebel CRM Deployment environment. The CVSS vector highlights high impacts across all three core security pillars: confidentiality (C:H), integrity (I:H), and availability (A:H). This means that an attacker can not only exfiltrate sensitive customer data stored within the CRM system but also modify critical business logic or configurations, potentially disrupting ongoing sales operations and damaging organizational reputation. Furthermore, the ability to take over the deployment provides a persistent foothold for lateral movement into other parts of the enterprise network, turning this single point of failure into a potential gateway for broader infrastructure compromise.
In terms of industry standard classification, this vulnerability aligns with CWE-269 Improper Privilege Management and potentially CWE-78 OS Command Injection or CWE-94 Code Injection depending on the specific underlying mechanism exploited within the Server Infrastructure component. From an adversary behavior perspective, it maps to MITRE ATT&CK techniques such as T1053 Scheduled Task/Job which may be used for persistence after initial access, and T1078 Valid Accounts if low-level credentials are abused. The high availability impact also correlates with potential denial-of-service capabilities inherent in privilege escalation flaws that crash critical services during exploitation attempts.
Mitigation strategies must prioritize immediate patching to the latest supported version of Oracle Siebel CRM as provided by vendor security advisories, which typically address these server infrastructure weaknesses through code hardening and input validation improvements. In environments where patching is not immediately feasible, network segmentation should be enforced to restrict HTTPS access to the Siebel deployment servers strictly from authorized management stations or application tiers, effectively reducing the attack surface for low-privileged attackers on broader networks. Additionally, implementing strict web application firewalls with rules targeting known exploitation patterns associated with this vulnerability class can provide a layer of defense-in-depth while longer-term remediation plans are executed. Continuous monitoring of authentication logs and system integrity checks should be intensified to detect any unauthorized privilege escalation attempts or anomalous configuration changes indicative of successful compromise.