CVE-2026-47018 in Siebel CRM Cloud Applications
Summary
by MITRE • 07/22/2026
Vulnerability in the Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager). Supported versions that are affected are 22.3-26.5. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Siebel CRM Cloud Applications. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Siebel CRM Cloud Applications. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
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Analysis
by VulDB Data Team • 07/22/2026
This vulnerability resides within Oracle Siebel CRM Cloud Applications, specifically in the Siebel Cloud Manager component affecting versions 22.3 through 26.5. The flaw represents a critical availability risk that can be exploited by unauthenticated attackers possessing only network access via HTTPS protocol. The vulnerability's ease of exploitation means that threat actors can readily compromise the affected systems without requiring any prior authentication credentials or privileged access. This characteristic places the vulnerability in the category of highly dangerous security flaws as defined by the Common Weakness Enumeration standard CWE-1004, which categorizes weaknesses that are easily exploitable and have severe impact potential. The CVSS 3.1 scoring system assigns this vulnerability a base score of 7.5, reflecting its high availability impact severity.
The technical nature of this vulnerability allows attackers to execute a complete denial-of-service attack against the Siebel CRM Cloud Applications, resulting in either system hangs or frequently repeatable crashes that can render the application completely unavailable to legitimate users. This type of exploit directly impacts the availability component of the CIA triad and aligns with ATT&CK technique T1498, which covers network denial of service attacks. The vulnerability's ability to cause repeated crashes suggests a potential buffer overflow or resource exhaustion condition within the Siebel Cloud Manager component that handles incoming HTTPS requests. The absence of authentication requirements makes this particularly dangerous as it can be exploited by anyone on the internet who has access to the target network, without needing to overcome any access controls or credentials.
The operational impact of this vulnerability extends beyond simple service disruption, as it can severely compromise business continuity for organizations relying on Siebel CRM applications. When the application becomes unavailable due to repeated crashes or hangs, it directly affects customer relationship management processes, sales operations, and other critical business functions that depend on the system's availability. The complete DOS condition means that legitimate users cannot access the CRM functionality until the vulnerability is patched or mitigated, potentially resulting in significant financial losses and operational downtime. Organizations utilizing these affected versions face immediate risk of service interruption that could impact their competitive position and customer satisfaction levels.
Mitigation strategies should focus on immediate patch management implementation as provided by Oracle security advisories for the affected versions. Organizations must prioritize updating their Siebel CRM Cloud Applications to versions that contain fixes for this vulnerability, particularly considering the CVSS score indicating high availability impact. Network-level protections such as firewalls or intrusion prevention systems can be configured to monitor and restrict access patterns that might indicate exploitation attempts, although these measures provide only partial protection given the unauthenticated nature of the attack. The vulnerability's classification under CWE-1004 suggests that defensive coding practices should be reviewed in the Siebel Cloud Manager component to prevent similar issues in future development cycles. Additionally, organizations should implement monitoring solutions to detect unusual patterns that might indicate attempted exploitation of this availability-focused vulnerability.