CVE-2026-83407

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Authentication Bypass in Oracle Access Manager

Publication date: 2026-10-20

Last updated on: 2026-10-27

Assigner: Oracle

Description

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 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Access Manager. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Access Manager accessible data as well as unauthorized update, insert or delete access to some of Oracle Access Manager accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Access Manager. CVSS 3.1 Base Score 8.6 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L).

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-27

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-83407

EUVD

EUVD-2026-106324

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	Oracle Access Manager	12.2.1.4.0
Oracle Corporation	Oracle Access Manager	14.1.2.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Access Manager, a product under Oracle Fusion Middleware. It affects versions 12.2.1.4.0 and 14.1.2.0.0. The issue allows an unauthenticated attacker to remotely access the system via HTTP and potentially compromise sensitive data or disrupt services.

Impact Analysis

An attacker could gain unauthorized access to critical data, modify or delete accessible data, or cause a partial denial of service. This could lead to data breaches, data loss, or service disruptions for systems relying on Oracle Access Manager.

Compliance Impact

This vulnerability could lead to unauthorized access or exposure of sensitive data, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Organizations using affected versions may face legal and regulatory penalties.

Mitigation Strategies

Apply the latest Oracle Access Manager patches or updates immediately to address the vulnerability. Ensure network access controls restrict HTTP access to trusted sources only. Monitor for unauthorized access attempts or unusual activity in Oracle Access Manager logs.

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