CVE-2026-83399CWE-287CWE-306

CVE-2026-83399

Critical · published October 21, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
40.7
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00483 · 40.7th percentile
Weaknesses
CWE-287 · Improper Authentication; CWE-306 · Missing Authentication for Critical Function
Published
2026-10-21T02:19Z
References (1)
https://www.oracle.com/security-alerts/cpuoct2026.html · [email protected]
EPSS history
Timeline
  • 22 OCT 03:35Z
    EPSS moved — → 1%
    epss
  • 20 OCT 21:23Z
    Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core)
    cvelistv5
  • 20 OCT 21:23Z
    Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core)
    cvelistv5