CVE-2025-21535Known exploitationNetwork attack vector

Unauthenticated remote server takeover

Published Jan 21, 2025 · Updated Feb 26, 2026

Missing authentication in Oracle WebLogic Server 12.2.1.4.0 and 14.1.1.0.0 allows remote attackers to take over the server via T3 or IIOP. Oracle has not disclosed which Core function omits authentication or how crafted T3 or IIOP traffic reaches it. Network access to either protocol is sufficient; successful exploitation grants control of WebLogic Server and compromises its data and availability.

CVSS severity9.8
Critical
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Oracle WebLogic Server 12.2.1.4.0 and 14.1.1.0.0 allows remote attackers to take over the server via T3 or IIOP. Oracle has not disclosed which Core function omits authentication or how crafted T3 or IIOP traffic reaches it. Network access to either protocol is sufficient; successful exploitation grants control of WebLogic Server and compromises its data and availability.

The record

CVE
CVE-2025-21535
Published
Jan 21, 2025
Updated
Feb 26, 2026
Vendor
Oracle Corporation
Product
Oracle WebLogic Server
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 21, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record 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=12.2.1.4.0
  2. Affected versionversion=14.1.1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

9.8Oracle CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Reported exploitation

Technologies

Your stack

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Your stack

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