---
id: "CVE-2026-83407"
kind: "vulnerability"
aliases: ["CVE-2026-83407"]
title: "Oracle Access Manager: unauthenticated network attacker can read and change some data"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["identity", "oracle-access-manager", "oracle-fusion-middleware", "runtime", "self-hosted"]
not_affected_if: ["other-versions"]
published_at: "2026-10-20T22:19:57+00:00"
first_seen_at: "2026-10-23T21:57:25+00:00"
updated_at: "2026-10-23T22:39:39+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83407", "first_seen_at": "2026-10-23T21:57:25+00:00"}]
---

# Oracle Access Manager: unauthenticated network attacker can read and change some data

Oracle Access Manager's Authentication Engine component, in versions 12.2.1.4.0 and 14.1.2.0.0, can be reached over HTTP without logging in. An attacker can read critical data, change or delete some data, and partly disrupt the service.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

Confirm the installed Oracle Access Manager version; 12.2.1.4.0 and 14.1.2.0.0 are listed as affected. Exact command or file: unknown.

## Timeline

- 2026-10-23T21:57:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-83407

## From the sources

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).

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