CVE-2026-91338 in iSupport
Summary
by MITRE • 10/21/2026
Vulnerability in the iSupport product of Oracle E-Business Suite (component: Internal operations). Supported versions that are affected are 12.2.3-12.2.15. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise iSupport. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all iSupport accessible data as well as unauthorized read access to a subset of iSupport accessible data. CVSS 3.1 Base Score 7.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the iSupport component of Oracle E-Business Suite, specifically affecting internal operations across supported versions ranging from 12.2.3 to 12.2.15. This security flaw represents a significant risk to organizations relying on this enterprise resource planning and customer relationship management platform for their operational workflows. The vulnerability is characterized by its ease of exploitation, allowing an attacker with low privileges who possesses network access via the HTTP protocol to compromise the integrity and confidentiality of the iSupport application environment. Unlike complex zero-day exploits that require sophisticated chaining or physical proximity, this flaw can be leveraged through standard web interactions, making it a persistent threat for any instance exposed to internal networks where untrusted users might have authenticated access.
From a technical perspective, the core issue lies in insufficient authorization checks within the iSupport module's handling of HTTP requests. The system fails to properly validate whether a low-privileged user has the necessary permissions to perform specific administrative or data-manipulation actions that should be restricted to higher-level roles. This misconfiguration effectively allows privilege escalation through role confusion or direct object reference manipulation, enabling attackers to bypass intended access controls. By exploiting this flaw, an attacker can execute commands or send requests that trigger unauthorized creation, deletion, or modification of critical business data stored within the iSupport database. Furthermore, the vulnerability permits unauthorized read access to a subset of accessible data, exposing sensitive customer information, support tickets, and internal operational metrics to entities that should not have visibility into such records.
The operational impact of this vulnerability is severe, primarily due to its high integrity impact as reflected in the CVSS 3.1 scoring system which assigns a base score of 7.1. The vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N) indicates that while availability is not directly compromised, confidentiality and integrity are significantly affected. Unauthorized modification of critical data can lead to substantial business disruption, including the corruption of customer records, loss of support history, or manipulation of service level agreements. The ability to delete data poses a risk of permanent information loss if backups are insufficient or delayed. Additionally, unauthorized read access facilitates social engineering attacks and competitive intelligence gathering by exposing proprietary processes and client details. This undermines trust in the system's reliability and can lead to regulatory non-compliance depending on the nature of the exposed data, such as personally identifiable information protected under GDPR or HIPAA regulations.
In terms of industry standard classifications, this vulnerability aligns with CWE-269 Improper Privilege Management and CWE-862 Missing Authorization, which describe scenarios where access control mechanisms fail to restrict actions based on user roles. The exploitation method corresponds to MITRE ATT&CK technique T1078 Valid Accounts, as it leverages legitimate but low-level credentials to perform unauthorized activities. It also touches upon T1530 Data from Cloud Storage if the underlying data is considered cloud-accessible within the enterprise context, though primarily it represents an internal network-based attack vector. Understanding these mappings helps security teams categorize the risk accurately and prioritize remediation efforts alongside other similar access control flaws in their environment.
To mitigate this vulnerability, organizations must immediately apply the latest Oracle Critical Patch Update (CPU) that addresses this specific issue within iSupport. It is crucial to verify that all instances running versions 12.2.3 through 12.2.15 are updated to a patched release where these authorization checks have been reinforced. In addition to patching, implementing strict network segmentation can limit exposure by ensuring that only authorized administrative workstations or specific application servers can communicate with the iSupport backend over HTTP. Enforcing multi-factor authentication for all user accounts adds an additional layer of security, reducing the likelihood that compromised low-privilege credentials can be used effectively even if they are obtained through phishing or other means. Regular audits of user permissions and role assignments should also be conducted to ensure that the principle of least privilege is strictly enforced across the E-Business Suite environment, minimizing the potential blast radius of any future access control failures.