---
title: "CVE-2026-83399: Oracle WebLogic Server - Remote Code Execution"
description: "Oracle WebLogic Server 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0 contain a remote code execution caused by unauthenticated network access via T3 and IIOP protocols, letting attackers fully compromise the server, exploit requires network access to T3 or IIOP."
url: https://panop.io/threat-heartbeat/CVE-2026-83399/
---

# CVE-2026-83399 Oracle WebLogic Server - Remote Code Execution

Oracle WebLogic Server 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0 contain a remote code execution caused by unauthenticated network access via T3 and IIOP protocols, letting attackers fully compromise the server, exploit requires network access to T3 or IIOP.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-83399)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

20 October 2026

Updated

21 October 2026

## Vendor fix

Update to the latest available version beyond 15.1.1.0.0.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-83399](https://nvd.nist.gov/vuln/detail/CVE-2026-83399)
- [https://www.oracle.com/security-alerts/cpuoct2026.html](https://www.oracle.com/security-alerts/cpuoct2026.html)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)