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CVE-2026-83343 – Unauthenticated Data Exposure / Integrity Compromise – Oracle Utilities Network Man

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Summary

CVE-2026-83343 is a high-severity vulnerability in the Oracle Utilities Network Management System (component: System Wide) that allows an unauthenticated, remote attacker to compromise the system over HTTP. Successful exploitation can grant complete access to all data accessible to the application and allow unauthorized modification, insertion, or deletion of some of that data. Oracle rates this as "easily exploitable," requiring no authentication or user interaction.

Technical details

  • Root cause: Oracle’s advisory attributes the flaw to the "System Wide" component of Oracle Utilities Network Management System; Oracle has not published low-level technical root-cause detail (e.g., specific vulnerable code path) beyond the CVE description.
  • Trigger conditions: An attacker only needs network access to the application’s HTTP interface — no credentials or user interaction are required.
  • Attack vector: Network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N).
  • Impact: High confidentiality impact — complete access to all data accessible to the application; low integrity impact — unauthorized update, insert, or delete of some accessible data; no availability impact.

Affected software

  • Oracle Utilities Network Management System 2.5.0.2.0 through 2.5.0.2.13
  • Oracle Utilities Network Management System 2.6.0.1.0 through 2.6.0.12B
  • Oracle Utilities Network Management System 2.6.0.2.0 through 2.6.0.2.10A
  • Oracle Utilities Network Management System 25.12.0.0.0 through 25.12.0.0.3

Severity

  • CVSS v3.1 Base Score: 8.2 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Mitigation and recommended actions

  • Immediate: Apply the fix provided in Oracle’s September 2026 Critical Patch Update (Security Alert) for Oracle Utilities Network Management System. Upgrade to a version beyond the affected ranges listed above as specified in Oracle’s advisory for your specific release track.
  • If immediate patching is not possible: Restrict network access to the Oracle Utilities Network Management System HTTP interface to trusted internal networks or VPN only, since the vulnerability is remotely exploitable without authentication; monitor access logs for anomalous unauthenticated requests until the patch can be applied.

References

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