Oracle WebLogic Server T3 Protocol Unauthenticated Remote Takeover
Actively exploited in the wild. Patch or mitigate immediately — don't wait for a maintenance window.
An unauthenticated attacker, remotely over the network, with no user interaction, can fully compromise the system — steal data, tamper with it and take it offline.
Vulnerability in the Oracle WebLogic Server component of Oracle Fusion Middleware (subcomponent: WLS Core Components). Supported versions that are affected are 10.3.6.0, 12.1.3.0, 12.2.1.2 and 12.2.1.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via T3 to compromise Oracle WebLogic Server. Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.0 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Inferred from the weakness type (CWE) and how the flaw is reached — the techniques an attacker would chain to exploit this. Real-world corroboration appears here as threat intel is folded in.
Corroborated threat activity referencing this CVE — with source and confidence, not inference.
Named threat actors and observed ATT&CK techniques appear here as intel feeds are folded in — the ATT&CK chain above stays inferred until then.
Generated by Wavense from the CVE record — an immediate mitigation and the permanent fix.
Restrict access to the T3 protocol port(s) (typically 7001) at the network perimeter using firewalls, allowing connections only from trusted hosts or subnets. Consider disabling the T3 protocol entirely if not actively used, or implement custom security filters to block untrusted deserialization. Enhance monitoring for unusual activity originating from or targeting WebLogic T3 ports.
Apply the vendor-provided security patches from Oracle immediately to all affected WebLogic Server installations. Ensure all supported versions, specifically 10.3.6.0, 12.1.3.0, 12.2.1.2, and 12.2.1.3, are updated to a non-vulnerable release. Regular patch management and staying current with Oracle's Critical Patch Updates (CPUs) are essential for long-term security.
An unauthenticated attacker can exploit this vulnerability via the T3 protocol to achieve full remote code execution and ultimately take over the Oracle WebLogic Server. This grants complete control over the affected server, leading to severe confidentiality breaches, data integrity loss, and service availability disruption, impacting critical business operations.
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Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Console). Supported versions that are affected are 10.3.6.0.0, 12.1.3.0.0, 12.2.1.3.0, 12.2.1.4.0 and 14.1.1.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP 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).
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