CVE-2026-83042 Oracle CVE debrief

Who should care

Oracle Identity Manager administrators, security teams responsible for Oracle Fusion Middleware, and IT personnel managing identity management systems should assess exposure and prioritize patching or mitigation efforts.

Why it matters

CVE-2026-83042 is a critical vulnerability in Oracle Identity Manager's OIM Legacy UI that allows unauthenticated attackers to compromise the system via HTTP, potentially leading to a complete takeover. Oracle Identity Manager administrators and security teams should assess exposure and prioritize patching or mitigation efforts to prevent potential takeover and compromise of confidentiality, integrity, and availability.

• Potential takeover of Oracle Identity Manager instances by unauthenticated attackers
• Compromise of confidentiality, integrity, and availability of Oracle Identity Manager systems
• Need for immediate patching or mitigation to prevent exploitation
• Verification of inventory and exposure of Oracle Identity Manager versions 12.2.1.4.0 and 14.1.2.1.0

Technical summary

The vulnerability in Oracle Identity Manager's OIM Legacy UI component allows unauthenticated attackers with network access via HTTP to compromise the system. Successful attacks can result in a complete takeover of Oracle Identity Manager. The CVSS 3.1 Base Score is 9.8, indicating critical severity. The vulnerability is exploitable via HTTP, and Oracle Identity Manager versions 12.2.1.4.0 and 14.1.2.1.0 are affected. Immediate attention is required to assess exposure and apply necessary patches or mitigations to prevent potential takeover of Oracle Identity Manager instances.

Defensive priority

Immediate attention is required to assess exposure and apply necessary patches or mitigations to prevent potential takeover of Oracle Identity Manager instances.

Recommended defensive actions

• Assess exposure of Oracle Identity Manager instances to this vulnerability
• Apply patches or mitigations provided by Oracle to prevent exploitation
• Monitor for potential takeover attempts
• Verify inventory of Oracle Identity Manager versions 12.2.1.4.0 and 14.1.2.1.0
• Implement compensating controls if patching is not immediately feasible

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, including its CVSS score of 9.8, indicating a critical severity. The vulnerability affects Oracle Identity Manager versions 12.2.1.4.0 and 14.1.2.1.0.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.