CVE-2026-83073 in Siebel CRM Cloud Applications
Summary
by MITRE • 09/16/2026
Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager). Supported versions that are affected are 22.3-26.7. Easily exploitable vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the Siebel CRM Cloud Applications executes to compromise Siebel CRM Cloud Applications. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Siebel CRM Cloud Applications accessible data as well as unauthorized access to critical data or complete access to all Siebel CRM Cloud Applications 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 Siebel Cloud Manager component of Oracle Siebel CRM, specifically affecting supported versions ranging from 22.3 through 26.7. This security flaw represents a significant risk to organizations relying on this enterprise customer relationship management platform for critical business operations. The core issue stems from insufficient authentication controls or validation mechanisms within the cloud manager interface, which allows an attacker who has gained access to the physical communication segment attached to the hardware hosting the Siebel CRM Cloud Applications to exploit the system without requiring valid credentials. This type of vulnerability is particularly dangerous because it bypasses traditional network perimeter defenses that rely on logical separation and authentication protocols, instead leveraging direct physical or link-layer proximity to execute malicious actions.
From a technical perspective, this flaw aligns with CWE-287, which describes Improper Authentication, as well as CWE-306, Missing Authentication for Critical Function. The attacker does not need user interaction or complex social engineering tactics; the exploit is straightforward and requires only network-level access to the specific segment where the vulnerable hardware resides. This lowers the barrier to entry significantly compared to remote code execution vulnerabilities that require sophisticated payload delivery mechanisms. Once an unauthenticated actor establishes a connection on this physical communication segment, they can interact directly with the management interfaces of the Siebel Cloud Manager, exploiting weaknesses in how session tokens or administrative privileges are validated and enforced during local network communications.
The operational impact of successfully exploiting this vulnerability is severe, encompassing both confidentiality and integrity breaches as indicated by the CVSS 3.1 Base Score of 8.1. An attacker can achieve unauthorized creation, deletion, or modification of critical data within the Siebel CRM environment. This means that sensitive customer information, sales pipelines, contract details, and other proprietary business intelligence could be altered, destroyed, or exfiltrated without detection. Furthermore, the vulnerability grants complete access to all Siebel CRM Cloud Applications accessible data, effectively compromising the entire scope of the application's security boundary from within the local network segment. This level of access allows for comprehensive data theft and potential manipulation of business logic, which can lead to significant financial loss, regulatory non-compliance, and reputational damage.
In terms of threat modeling, this vulnerability maps closely to MITRE ATT&CK techniques related to Local Network Discovery and Credential Access or potentially Remote Services if the physical segment is considered part of a trusted internal zone that lacks micro-segmentation. The attack vector AV:A indicates an Adjacent network position, meaning the attacker must be physically close enough to tap into the same switch port or broadcast domain as the target server. This highlights the importance of strict access control lists on switches and VLAN segmentation to prevent unauthorized devices from communicating with critical infrastructure components. Without such controls, any device plugged into a shared segment can attempt these exploits.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Oracle should be consulted for available patches or updates that address the authentication flaws in Siebel Cloud Manager versions 22.3 through 26.7. Applying these security updates is the primary defense against this specific vulnerability. Additionally, organizations should implement strict network segmentation policies to isolate critical application servers from general user access points and untrusted devices. Implementing port security on switches to limit MAC address learning and disabling unused ports can prevent unauthorized physical connections. Furthermore, deploying intrusion detection systems that monitor for anomalous traffic patterns associated with authentication bypass attempts can provide early warning indicators of exploitation activity. Regular audits of network topology and strict enforcement of zero-trust principles within the internal network are essential to mitigate risks posed by adjacent network attackers.