CVE intelligence and bounded remediation

CVE-2023-39547 — Nec Expresscluster X security vulnerability

High CVSS 8.8

CLUSTERPRO X Ver5.1 and earlier and EXPRESSCLUSTER X 5.1 and earlier, CLUSTERPRO X SingleServerSafe 5.1 and earlier, EXPRESSCLUSTER X SingleServerSafe 5.1 and earlier allows a attacker to log in to the product may execute an arbitrary command.

Severity
High
CVSS
8.8 (3.1)
Published
2023-11-17
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-294

Affected products

  • nec / expresscluster_x / 1.0
  • nec / expresscluster_x / 2.0
  • nec / expresscluster_x / 2.1
  • nec / expresscluster_x / 3.0
  • nec / expresscluster_x / 3.1
  • nec / expresscluster_x / 3.2

Showing 6 representative product identities from 48 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authentication bypass and missing authentication

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Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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