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CVE-2026-60202 – Unauthenticated RCE via T3/IIOP – Oracle WebLogic Server 12.2.1.4.0 – 15.1.1.0.0

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Summary

CVE-2026-60202 is a critical unauthenticated remote code execution vulnerability affecting the Core component of Oracle WebLogic Server. The flaw is exploitable over the network via Oracle’s T3 and IIOP protocols with no authentication and no user interaction required, resulting in full confidentiality, integrity, and availability compromise of the affected server. It was disclosed on July 21, 2026 as part of Oracle’s July 2026 Critical Patch Update and carries a CVSS v3.1 base score of 9.8.

Technical details

  • Attack vector: Network-accessible T3 and IIOP protocols (Oracle’s binary communication channels used for Java EE inter-component messaging), typically exposed on ports 7001 and 7002.
  • Authentication required: None — the vulnerability is exploitable by any unauthenticated remote attacker with network access to the affected WebLogic instance.
  • Attack complexity: Low — no special conditions or race conditions are required to trigger the vulnerability.
  • Impact: Complete server compromise. Successful exploitation results in high impacts to confidentiality, integrity, and availability, consistent with full server takeover (remote code execution).
  • No user interaction required: The attack is entirely server-side and requires no action from a legitimate user.

Affected software

  • Oracle WebLogic Server 12.2.1.4.0
  • Oracle WebLogic Server 14.1.1.0.0
  • Oracle WebLogic Server 14.1.2.0.0
  • Oracle WebLogic Server 15.1.1.0.0

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Apply the Oracle July 2026 Critical Patch Update (CPU) patches for Oracle Fusion Middleware, which address CVE-2026-60202 across all affected WebLogic Server versions. Patch details and instructions are available via Oracle’s Fusion Middleware CPU documentation referenced from the July 2026 CPU advisory.
  • Network mitigation (if immediate patching is not feasible): Restrict or block network access to WebLogic T3 and IIOP ports (typically TCP 7001 and 7002) from untrusted networks and the public internet using firewall rules or network access controls. WebLogic T3/IIOP should never be directly internet-exposed.
  • Additional hardening: Audit firewall and perimeter rules to ensure the WebLogic Administration Console (/console) and managed server ports are not publicly accessible.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

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2

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IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

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By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

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Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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