CVE-2026-83002 in Access Manager
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: Authentication Engine). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Access Manager. While the vulnerability is in Oracle Access Manager, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle Access Manager. CVSS 3.1 Base Score 8.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Authentication Engine component of Oracle Access Manager, a critical identity governance solution included in Oracle Fusion Middleware versions 12.2.1.4.0 and 14.1.2.1.0. This flaw represents a significant security risk due to its potential for privilege escalation and system compromise despite requiring specific conditions for exploitation. The vulnerability is classified as difficult to exploit, indicating that while the underlying technical defect exists, an attacker must navigate complex constraints or precise timing to successfully leverage it against a target system.
From a technical perspective, this flaw allows a low-privileged attacker with network access via HTTP to compromise the Oracle Access Manager infrastructure. The requirement for low privileges suggests that the vulnerability does not demand administrative credentials initially, making it accessible to users who have been granted basic or standard user roles within the environment. However, the difficulty of exploitation implies that successful attacks likely require sophisticated techniques, such as specific input manipulation or race conditions, which may limit the pool of potential attackers but increases the severity for those capable of executing them. The attack vector being network-based via HTTP indicates that remote exploitation is possible without physical access to the target systems, provided there are no intervening network security controls like firewalls or intrusion detection systems blocking the specific traffic patterns associated with the exploit.
The operational impact of this vulnerability is severe, as successful exploitation can result in a complete takeover of Oracle Access Manager. This level of compromise grants an attacker full control over the authentication and authorization mechanisms managed by the product. Consequently, attackers could bypass security controls, impersonate legitimate users, or manipulate access policies to grant themselves unauthorized privileges. The CVSS 3.1 Base Score of 8.5 reflects high impacts on confidentiality, integrity, and availability. This score is driven by the scope change characteristic, where an attack in Oracle Access Manager significantly impacts additional products within the broader enterprise environment. Since Identity and Access Management systems serve as gatekeepers for numerous downstream applications and services, compromising this single component can lead to a cascading failure of security across multiple integrated systems.
In terms of industry standard classifications, this vulnerability aligns with CWE-269 Improper Privilege Escalation or potentially CWE-787 Out-of-bounds Write if the technical root cause involves memory corruption leading to code execution. The network-based nature and ability to compromise system integrity map closely to MITRE ATT&CK techniques such as T1078 Valid Accounts, where attackers use legitimate credentials with insufficient privileges to gain higher-level access, or T1548 Abuse Elevation Control Mechanism if the exploit involves manipulating privilege controls. The high availability impact also suggests potential for denial-of-service conditions resulting from system instability during exploitation attempts.
Mitigation strategies must prioritize immediate patching of Oracle Access Manager to the latest available version that addresses this specific flaw in the Authentication Engine. Organizations should verify their deployment versions against the supported list, specifically checking for 12.2.1.4.0 and 14.1.2.1.0 vulnerabilities. In environments where patching is not immediately feasible, network segmentation strategies should be employed to restrict HTTP access to Oracle Access Manager components only from trusted subnets or specific application servers. Implementing strict input validation on any exposed endpoints related to the authentication engine can also help mitigate exploitation attempts. Additionally, monitoring for anomalous login patterns and privilege escalation events within the audit logs is essential for early detection of potential compromise activities targeting this component.