CVE-2026-83399
CriticalCVSS 9.8Summary
Vulnerability in Oracle WebLogic Server (Core component) affecting versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0. An unauthenticated attacker with network access via T3 or IIOP can take over Oracle WebLogic Server.
Risk Assessment
High risk — easy unauthenticated exploitation can lead to full takeover of Oracle WebLogic Server and compromise of confidentiality, integrity, and availability.
Recommendation
Apply the latest Oracle security updates for Oracle WebLogic Server. Restrict access to T3/IIOP ports and monitor network traffic.
Other vulnerabilities in Oracle WebLogic Server
See all- CVE-2026-91502High
Vulnerability in the Core component of Oracle WebLogic Server (Oracle Fusion Middleware). An unauthenticated attacker can exploit it over the network via TLS to perform unauthorized update, insert or delete access to some data, read a subset of data, and cause a partial denial of service. CVSS 7.3.
- CVE-2017-10147High
A vulnerability in the Oracle WebLogic Server component of Oracle Fusion Middleware allows an unauthenticated attacker with network access via T3 to compromise the server. Attacks may lead to hanging or frequent crashes of the server, resulting in a complete denial of service (DoS).
- CVE-2016-3505High
Unspecified vulnerability in the Oracle WebLogic Server component in Oracle Fusion Middleware 10.3.6.0, 12.1.3.0, and 12.2.1.0 allows remote authenticated users to affect confidentiality, integrity, and availability via vectors related to JavaServer Faces.
- CVE-2016-0577High
Unspecified vulnerability in the Oracle WebLogic Server component in Oracle Fusion Middleware 10.3.6, 12.1.2, 12.1.3, and 12.2.1 allows remote attackers to affect confidentiality, integrity, and availability.
- CVE-2016-0574High
Unspecified vulnerability in the Oracle WebLogic Server component in Oracle Fusion Middleware 10.3.6, 12.1.2, 12.1.3, and 12.2.1 allows remote attackers to affect confidentiality, integrity, and availability.
- CVE-2016-0573High
Unspecified vulnerability in the Oracle WebLogic Server component in Oracle Fusion Middleware 10.3.6, 12.1.2, 12.1.3, and 12.2.1 allows remote attackers to affect confidentiality, integrity, and availability via vectors related to WLS Java Messaging Service.
- CVE-2016-0572High
Unspecified vulnerability in the Oracle WebLogic Server component in Oracle Fusion Middleware 10.3.6, 12.1.2, 12.1.3, and 12.2.1 allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors related to Coherence Container.
- CVE-2014-2470High
Unspecified vulnerability in the Oracle WebLogic Server component in Oracle Fusion Middleware 10.0.2.0, 10.3.6.0, 12.1.1.0, and 12.1.2.0 allows remote attackers to affect confidentiality, integrity, and availability via vectors related to WLS Security.
- CVE-2026-91323Critical
Vulnerability in Oracle WebLogic Server (Core component) affecting versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. An unauthenticated attacker with HTTP network access can take over the server.
- CVE-2026-87302Critical
Vulnerability in Oracle WebLogic Server (Core component) affecting versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0. An unauthenticated attacker with network access via HTTP can create, delete, or modify critical data and gain full access to it.
Original NVD description (English source)
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. 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 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).
Vulnerability data from NVD (NIST) · CISA KEV · EPSS