CVE-2026-101401 in Siebel Apps
Summary
by MITRE • 10/21/2026
Vulnerability in the Siebel Apps - Marketing product of Oracle Siebel CRM (component: Marketing). Supported versions that are affected are 17.0-26.9. Difficult to exploit vulnerability allows unauthenticated attacker with logon to the infrastructure where Siebel Apps - Marketing executes to compromise Siebel Apps - Marketing. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Siebel Apps - Marketing. CVSS 3.1 Base Score 2.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Marketing component of Oracle Siebel CRM, specifically affecting supported versions ranging from 17.0 through 26.9. This security flaw is characterized by a difficulty in exploitation that necessitates an attacker to have prior logon access to the infrastructure hosting the Siebel Apps - Marketing service. Unlike remote code execution or unauthenticated network attacks, this vulnerability requires local presence on the system where the application executes, significantly limiting its attack surface but highlighting risks associated with compromised internal hosts or insider threats. The core technical flaw allows an authenticated user who has gained initial access to the infrastructure to trigger conditions that lead to a partial denial of service against the Siebel Marketing application itself. This indicates that the vulnerability likely involves resource exhaustion, state corruption, or improper handling of specific inputs by the marketing module's processing logic, causing the service to become unresponsive or degrade in performance for other users sharing those resources.
From an operational impact perspective, this vulnerability primarily affects the availability aspect of the CIA triad, as reflected in its CVSS 3.1 base score of 2.9 which is classified as Low severity due to the limited scope and high complexity required for exploitation. The partial denial of service means that while the system may not crash entirely, critical marketing functions such as campaign execution, data synchronization, or user interface responsiveness could be severely impaired during an attack window. This disruption can lead to significant business operational delays, missed communication windows with customers, and potential loss of trust among users relying on the platform for time-sensitive activities. Because the vulnerability requires local logon access, it underscores the importance of strict host-based security controls and monitoring within the infrastructure layer rather than just application-layer defenses.
In terms of industry standard classifications, this vulnerability aligns with CWE-400: Uncontrolled Resource Consumption or potentially CWE-756: Missing Custom Error Page if the denial of service manifests as a generic error state that hinders normal operation. The attack vector corresponds to ATT&CK technique T1059: Command and Scripting Interpreter, assuming the attacker uses local scripts to trigger the flaw, or more broadly falls under lateral movement scenarios where an already compromised host is used to disrupt services on adjacent systems within the same infrastructure segment. It also relates to availability-focused attacks often categorized under resource exhaustion patterns in enterprise environments.
Mitigation strategies should focus heavily on hardening the underlying operating system and network architecture rather than solely patching the application code, given the high complexity of exploitation. Implementing strict access control lists (ACLs) for the servers hosting Siebel Apps - Marketing is critical to ensure that only authorized administrative accounts can log into these infrastructure nodes. Network segmentation should be enforced to isolate marketing-related services from general user workstations and less privileged network zones, thereby reducing the likelihood of an attacker achieving local logon access in the first place. Additionally, deploying host-based intrusion detection systems (HIDS) with behavioral analytics can help identify anomalous resource consumption patterns indicative of this denial-of-service attempt before it causes significant disruption. Regular auditing of user accounts on these specific servers and enforcing multi-factor authentication for any administrative or privileged access to the infrastructure will further reduce the risk profile associated with this vulnerability.