---
id: "CVE-2020-14644"
kind: "vulnerability"
aliases: ["CVE-2020-14644"]
title: "Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core)"
severity: "critical"
cvss: 9.8
epss: null
exploited: true
status: "open"
category: "runtime"
products: [{"name": "Oracle WebLogic Server", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "oracle weblogic server", "fixed": [], "affected": "= 12.2.1.3.0", "ecosystem": "vendor"}, {"name": "oracle weblogic server", "fixed": [], "affected": "= 12.2.1.4.0", "ecosystem": "vendor"}, {"name": "oracle weblogic server", "fixed": [], "affected": "= 14.1.1.0.0", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "java", "oracle", "runtime", "self-hosted", "weblogic"]
not_affected_if: ["default-config"]
published_at: "2020-07-15T18:15:29+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-14644", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-14644", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core)

Oracle WebLogic Server has a deserialization flaw in its T3 and IIOP protocol handling. An unauthenticated attacker with network access can execute code on the server.

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

## Affected

- vendor:Oracle WebLogic Server affected ? fixed ?
- vendor:oracle weblogic server affected = 12.2.1.3.0 fixed ?
- vendor:oracle weblogic server affected = 12.2.1.4.0 fixed ?
- vendor:oracle weblogic server affected = 14.1.1.0.0 fixed ?

## Fix

Apply the Oracle mitigation or patch per vendor instructions, or discontinue use of the product if mitigations are unavailable (per CISA required action).

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-14644
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2020-14644

## From the sources

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via IIOP, T3 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).

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