---
id: CVE-2026-83399
title: >-
  Vulnerability in the Oracle WebLogic Server product of Oracle Fusion
  Middleware (component: Core)
summary: >-
  Vulnerability in the Oracle WebLogic Server product of Oracle Fusion
  Middleware (component: Core).  Supported versions that are affected are
  12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and  15.1.1.0.0. Easily exploitable
  vulnerability allows unau…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Oracle Corporation
product: Oracle WebLogic Server
affected:
  - oracle_weblogic_server 12.2.1.4.0
  - oracle_weblogic_server 14.1.1.0.0
  - oracle_weblogic_server 14.1.2.0.0
  - oracle_weblogic_server 15.1.1.0.0
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T21:23:46.187Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-83399'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.880Z'
---

## Overview

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core).  Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and  15.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3, IIOP to compromise Oracle WebLogic Server.  Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

## Affected

- `oracle_weblogic_server 12.2.1.4.0`
- `oracle_weblogic_server 14.1.1.0.0`
- `oracle_weblogic_server 14.1.2.0.0`
- `oracle_weblogic_server 15.1.1.0.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.