CVE-2023-21964Network attack vector

Unauthenticated service interruption via T3 or IIOP

Published Apr 18, 2023 · Updated Sep 16, 2024

Denial of service in Oracle WebLogic Server 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0 allows remote attackers to crash or hang servers. Oracle identifies the Core component and T3 or IIOP request path but has not published the malformed input or resource operation that triggers exhaustion. No credentials or user interaction are required; successful attacks repeatedly crash or hang the server without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.84%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Oracle WebLogic Server 12.2.1.3.0, 12.2.1.4.0, and 14.1.1.0.0 allows remote attackers to crash or hang servers. Oracle identifies the Core component and T3 or IIOP request path but has not published the malformed input or resource operation that triggers exhaustion. No credentials or user interaction are required; successful attacks repeatedly crash or hang the server without reported data disclosure or modification.

The record

CVE
CVE-2023-21964
Published
Apr 18, 2023
Updated
Sep 16, 2024
Vendor
Oracle Corporation
Product
Oracle WebLogic Server
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.2.1.3.0
  2. Affected versionversion=12.2.1.4.0
  3. Affected versionversion=14.1.1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle WebLogic Serverversion=12.2.1.3.0; version=12.2.1.4.0; version=14.1.1.0.0

Published CVSS scores

7.5Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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