High 7.5Known exploited (CISA KEV)Published Jan 17, 2023

CVE-2023-21839Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core).

Updated under an hour ago (2026-10-19 09:10 UTC)

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It affects Oracle Corporation WebLogic Server. Add what you run to find out whether that includes you.

CISA lists it as known exploited since May 1, 2023; federal agencies had to remediate by May 22, 2023. Treat that date as your deadline.

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Every CVE for Oracle Corporation WebLogic Server

Exploited in the last 30 days

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 T3, IIOP to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle WebLogic Server accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-306
Known exploited: Added to CISA KEV May 1, 2023; federal remediation due May 22, 2023Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 99.90% (percentile 100)
Assigned by: oracle
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Oracle Corporation WebLogic Server oracle:weblogic_server (from the name)	12.2.1.3.0; 12.2.1.4.0; 14.1.1.0.0	CNA record
oracle weblogic_server oracle:weblogic_server	12.2.1.3.0; 12.2.1.4.0; 14.1.1.0.0	NVD

References

https://www.oracle.com/security-alerts/cpujan2023.htmlvendor-advisory, patch
http://packetstormsecurity.com/files/172882/Oracle-Weblogic-PreAuth-Remote-Command-Execution.htmlexploit, third-party-advisory, vdb-entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21839us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.