CVE intelligence and bounded remediation

CVE-2022-33323 — Mitsubishielectric Rh-12Sdh55 Firmware security vulnerability

High CVSS 7.5

Active Debug Code vulnerability in robot controller of Mitsubishi Electric Corporation industrial robot MELFA SD/SQ Series and MELFA F-Series allows a remote unauthenticated attacker to gain unauthorized access by authentication bypass through an unauthorized telnet login. As for the affected model names, controller types and firmware versions, see the Mitsubishi Electric's advisory which is listed in [References] section.

Severity
High
CVSS
7.5 (3.1)
Published
2023-02-02
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-489

Affected products

  • mitsubishielectric / rh-12sdh55_firmware
  • mitsubishielectric / rh-12sdh70_firmware
  • mitsubishielectric / rh-12sdh85_firmware
  • mitsubishielectric / rh-12sqh55_firmware
  • mitsubishielectric / rh-12sqh70_firmware
  • mitsubishielectric / rh-12sqh85_firmware

Showing 6 representative product identities from 51 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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