CVE-2026-83220 in Siebel CRM Integration
Summary
by MITRE • 09/16/2026
Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: Event Publish and Subscribe). Supported versions that are affected are 23.6-26.7. Easily exploitable vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the Siebel CRM Integration executes to compromise Siebel CRM Integration. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel CRM Integration accessible data as well as unauthorized access to critical data or complete access to all Siebel CRM Integration accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Event Publish and Subscribe component of Oracle Siebel CRM Integration, specifically affecting versions ranging from 23.6 through 26.7. This security flaw represents a critical weakness in the authentication mechanisms governing inter-component communication for event-driven architectures. The core technical issue stems from an insufficient verification process that permits unauthenticated entities to interact with sensitive integration endpoints. By exploiting this deficiency, an attacker who has established physical access to the network segment where the Siebel CRM Integration hardware resides can bypass standard security controls and execute unauthorized operations against the system. This scenario highlights a significant gap in zero-trust implementation for local area networks or dedicated integration buses that lack robust mutual authentication protocols at the transport layer.
From an operational perspective, the impact of this vulnerability is severe due to its high availability requirement on physical network segments rather than requiring remote internet exposure. An attacker with access to the physical communication segment can leverage easily exploitable conditions to compromise the integrity and confidentiality of the Siebel CRM Integration environment. Successful exploitation allows for unauthorized creation, deletion, or modification of critical data stored within the system. Furthermore, it grants the ability to read sensitive information that would otherwise be protected by authentication barriers. This capability effectively neutralizes the security perimeter provided by network segmentation if physical access is attainable, leading to potential data breaches and corruption of business-critical records managed by Siebel CRM.
The severity of this vulnerability is quantified by a CVSS 3.1 Base Score of 8.1, indicating a High level of risk. The vector string (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N) details the specific characteristics driving this score. The Attack Vector is Adjacent Network AV:A, meaning exploitation requires proximity to the target system's network segment but does not require direct physical interaction with the hardware itself once on that segment. The Attack Complexity is Low AC:L, suggesting that specialized conditions or complex exploit development are not necessary for a successful attack. Crucially, Privileges Required PR:N indicates no authentication is needed prior to exploitation, and User Interaction UI:N confirms that no user action is required beyond network access. While Availability A:N remains unaffected in the base score description provided, the high Confidentiality C:H and Integrity I:H impacts underscore the potential for significant data loss and tampering.
In terms of industry standard classification, this vulnerability aligns with CWE-287 Improper Authentication, as it involves a failure to correctly verify identity before granting access to resources. It also relates to CWE-306 Missing Authentication for Critical Function, given that critical integration events are exposed without proper credential validation. From an offensive security perspective, such exploitation techniques fall under the MITRE ATT&CK framework category of Initial Access or Lateral Movement, specifically leveraging adjacent network positions to pivot into more secure zones where sensitive CRM data resides. The lack of mutual authentication in event publishing and subscribing mechanisms is a common architectural flaw that attackers exploit when physical or local network security boundaries are breached.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Oracle has likely released patches for the affected versions 23.6 through 26.7, which should be applied immediately to close the authentication gap in the Event Publish and Subscribe component. Beyond patching, organizations should implement strict network segmentation policies that limit access to integration hardware only to authorized management stations using strong mutual TLS or certificate-based authentication mechanisms. Physical security controls must also be reinforced to prevent unauthorized individuals from accessing the physical communication segments where these systems operate. Additionally, deploying intrusion detection systems capable of identifying anomalous event publishing patterns can provide an additional layer of defense against exploitation attempts in environments where perfect network isolation is not feasible.