CISA-confirmed known exploited vulnerability

CVE-2023-21839

Oracle WebLogic Server Unspecified Vulnerability

Oracle · WebLogic Server

Vulnerability details

Oracle WebLogic Server contains an unspecified vulnerability that allows an unauthenticated attacker with network access via T3, IIOP, to compromise Oracle WebLogic Server.

Added to CISA KEV: 2023-05-01

Ransomware campaign use: Unknown

CISA due date: 2023-05-22

Defensive guidance from CISA

Apply updates per vendor instructions.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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