Description
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).
Published: 2026-10-20
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: Remote Code Execution
Action: Immediate Patch
AI Analysis

Impact

Easily exploitable vulnerability in Oracle WebLogic Server allows an unauthenticated attacker with network access via T3 or IIOP to compromise the server, potentially leading to full takeover; the flaw scores a CVSS 3.1 Base Score of 9.8 indicating complete confidentiality, integrity, and availability impacts.

Affected Systems

Affected versions are Oracle WebLogic Server 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0. These versions are part of the Oracle Fusion Middleware suite and are supported by Oracle as indicated in the advisories.

Risk and Exploitability

The vulnerability carries a high CVSS severity of 9.8 and its EPSS score is < 1%, indicating a low but non‑zero likelihood of exploitation. It is not listed in the CISA KEV catalog, yet the attack vector is network‑based and requires no authentication, meaning any system with exposed T3 or IIOP ports is at risk. Successful exploitation would result in the attacker gaining full control over the WebLogic Server instance.

Generated by OpenCVE AI on October 22, 2026 at 10:42 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest security patch for Oracle WebLogic Server from the referenced Oracle advisory up to date with the disclosed CVE-2026-83399
  • Restrict network access to the T3 and IIOP ports using firewall rules or VPN segmentation so that only trusted hosts can reach the WebLogic Server
  • Consider disabling the IIOP service if it is not required for your deployment to reduce the attack surface

Generated by OpenCVE AI on October 22, 2026 at 10:42 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Thu, 22 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Remote Code Execution via T3/IIOP in Oracle WebLogic Server

Thu, 22 Oct 2026 09:15:00 +0000

Type Values Removed Values Added
Title Easily exploitable Oracle WebLogic Server remote code execution via unauthenticated T3/IIOP access
Weaknesses CWE-284

Wed, 21 Oct 2026 11:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-306
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 21 Oct 2026 07:00:00 +0000

Type Values Removed Values Added
Title Easily exploitable Oracle WebLogic Server remote code execution via unauthenticated T3/IIOP access
Weaknesses CWE-284
CWE-287

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Description 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).
First Time appeared Oracle
Oracle weblogic Server
CPEs cpe:2.3:a:oracle:weblogic_server:12.2.1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:weblogic_server:14.1.1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:weblogic_server:14.1.2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:weblogic_server:15.1.1.0.0:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle weblogic Server
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Oracle Weblogic Server
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-21T10:55:18.762Z

Reserved: 2026-08-31T15:40:57.357Z

Link: CVE-2026-83399

cve-icon Vulnrichment

Updated: 2026-10-21T10:54:40.384Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-20T22:19:56.430

Modified: 2026-11-05T19:38:58.307

Link: CVE-2026-83399

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T21:15:12Z

Weaknesses
  • CWE-287

    Improper Authentication

  • CWE-306

    Missing Authentication for Critical Function