CVE intelligence and bounded remediation

CVE-2022-29951 — JTEKT TOYOPUC PLCs through 2022-04-29 mishandle authentication

Critical CVSS 9.1

JTEKT TOYOPUC PLCs through 2022-04-29 mishandle authentication. They utilize the CMPLink/TCP protocol (configurable on ports 1024-65534 on either TCP or UDP) for a wide variety of engineering purposes such as starting and stopping the PLC, downloading and uploading projects, and changing configuration settings. This protocol does not have any authentication features, allowing any attacker capable of communicating with the port in question to invoke (a subset of) desired functionality.

Severity
Critical
CVSS
9.1 (3.1)
Published
2022-07-26
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-306

Affected products

  • jtekt / pc10g-cpu_tcc-6353_firmware
  • jtekt / pc10ge_tcc-6464_firmware
  • jtekt / pc10p_tcc-6372_firmware
  • jtekt / pc10p-dp_tcc-6726_firmware
  • jtekt / pc10p-dp-io_tcc-6752_firmware
  • jtekt / pc10b-p_tcc-6373_firmware

Showing 6 representative product identities from 17 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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