CVE-2025-21549Network attack vector

Unauthenticated server hang or repeatable crash

Published Jan 21, 2025 · Updated Mar 13, 2025

Denial of service in Oracle WebLogic Server 14.1.1.0.0 allows remote attackers to hang or repeatedly crash the server via HTTP/2. Oracle identifies the affected locus only as the Core component and has not disclosed the incorrect operation performed during HTTP/2 request handling. Network access to an HTTP/2 listener is sufficient, without authentication or user interaction, and the documented consequence is limited to service availability.

CVSS severity7.5
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in Oracle WebLogic Server 14.1.1.0.0 allows remote attackers to hang or repeatedly crash the server via HTTP/2. Oracle identifies the affected locus only as the Core component and has not disclosed the incorrect operation performed during HTTP/2 request handling. Network access to an HTTP/2 listener is sufficient, without authentication or user interaction, and the documented consequence is limited to service availability.

The record

CVE
CVE-2025-21549
Published
Jan 21, 2025
Updated
Mar 13, 2025
Vendor
Oracle Corporation
Product
Oracle WebLogic Server
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=14.1.1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle WebLogic Serverversion=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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo