CVE-2026-62588 in Siebel CRM Integration
Summary
by MITRE • 08/19/2026
Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: Open Integration). Supported versions that are affected are 25.12-26.6. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM Integration. While the vulnerability is in Siebel CRM Integration, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Siebel CRM Integration. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 08/19/2026
The identified vulnerability resides within the Open Integration component of Oracle Siebel CRM, specifically affecting supported versions ranging from 25.12 through 26.6. This critical security flaw allows for remote code execution or system compromise by an attacker who possesses low-level privileges and has network access via HTTP to the affected service. The severity of this vulnerability is underscored by a CVSS 3.1 Base Score of 9.9, indicating a Critical level risk that threatens confidentiality, integrity, and availability simultaneously. The attack vector is classified as Network with Low Complexity, requiring no user interaction, which significantly lowers the barrier for exploitation compared to vulnerabilities requiring social engineering or local access.
From a technical perspective, the flaw enables an attacker to take complete control of the Siebel CRM Integration service. This level of compromise suggests that the vulnerability likely involves improper input validation, authentication bypass, or insecure deserialization within the integration layer. When such a component is compromised, it serves as a foothold for further lateral movement within the enterprise network. The Open Integration module acts as a bridge between Oracle Siebel CRM and external systems; therefore, exploiting this weakness allows an adversary to inject malicious payloads that can manipulate data flows or execute arbitrary commands on the underlying server infrastructure hosting the integration service.
The operational impact of this vulnerability extends beyond the immediate compromise of the Siebel CRM Integration component due to a scope change in the CVSS scoring model. The attacker's ability to pivot from the compromised integration layer into other connected products means that the blast radius is significantly wider than initially apparent. This cross-product impact implies that data stored in disparate systems linked through the integration framework may be exfiltrated, altered, or destroyed. Furthermore, the availability of these critical business applications could be disrupted, leading to significant downtime and operational paralysis for organizations relying on Oracle Siebel CRM for their customer relationship management processes.
In terms of industry classification standards, this vulnerability aligns with CWE-798: Use of Hard-coded Credentials if authentication is bypassed via default or weak credentials, or more likely CWE-20: Improper Input Validation if the exploit relies on malformed requests sent over HTTP. From an offensive security framework perspective, such a vulnerability facilitates Initial Access through Exploitation of Remote Services and potentially Privilege Escalation to gain higher-level system permissions. The ATT&CK technique T1190: Exploit Public-Facing Application is directly applicable here, as the integration endpoint is exposed via HTTP and leveraged by an attacker with low privileges to achieve full system takeover.
Mitigation strategies must prioritize immediate patching of all affected Siebel CRM versions to 25.12-26.6 or later where patches are available. Organizations should also implement strict network segmentation to isolate the integration components from general user networks, ensuring that only authorized internal services can communicate with these endpoints. Additionally, deploying Web Application Firewalls configured to detect and block common exploitation patterns associated with remote code execution vulnerabilities can provide a layer of defense in depth. Regular vulnerability scanning focused on external-facing HTTP services is essential to identify similar misconfigurations or unpatched components before they are exploited by malicious actors seeking to compromise enterprise CRM infrastructure.