What is CVE-2026-83021?

CVE-2026-83021 is a critical-severity vulnerability in Oracle Corporation Weblogic Server, classified under Improper Authentication. CVSS score: 10.0/10. Published 2026-09-15.

How severe is CVE-2026-83021?

Critical severity. CVSS v3 base score is 10.0 out of 10.

Auth bypass in Oracle Corporation Weblogic Server

CVE-2026-83021

Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Web Container). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebLogic Server. While the vulnerability is in Oracle WebLogic Server, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 10.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Oracle Corporation Weblogic Server — versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0

Weakness classification (CWE)

References

secalert_us@oracle.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-83021?: CVE-2026-83021 is a critical-severity vulnerability in Oracle Corporation Weblogic Server, classified under Improper Authentication. CVSS score: 10.0/10. Published 2026-09-15.
How severe is CVE-2026-83021?: Critical severity. CVSS v3 base score is 10.0 out of 10.