Unauthenticated Remote Code Execution Vulnerability in Oracle WebLogic Server
CVE-2026-83399

9.8CRITICAL

Key Information:

Vendor

Oracle
Status
Oracle Weblogic Server
Vendor
CVE Published:
20 October 2026

What is CVE-2026-83399?

The vulnerability in Oracle WebLogic Server within Oracle Fusion Middleware allows an unauthenticated attacker to gain network access through protocols like T3 and IIOP. This exploitation can lead to a complete takeover of the affected WebLogic instances, resulting in critical compromises of confidentiality, integrity, and availability.

Affected Version(s)

Oracle WebLogic Server 12.2.1.4.0

Oracle WebLogic Server 14.1.1.0.0

Oracle WebLogic Server 14.1.2.0.0

References

https://www.oracle.com/security-alerts/cpuoct2026.html
vendor-advisory

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.